Hidden Realm Cards

Legendary Enchantment Creature — Nightmare

The Mindskinner can't be blocked. If a source you control would deal damage to an opponent, prevent that damage and each opponent mills that many cards.

Land — Sphere

This land enters with two oil counters on it. {T}: Add {C}. {T}, Remove an oil counter from this land: Put an oil counter on target artifact or creature you control. Activate only as a sorcery.

Legendary Artifact Creature — Robot

When The Motherlode enters, choose target opponent. You get an amount of {E} (energy counters) equal to the number of nonbasic lands that player controls. Whenever The Motherlode attacks, you may pay {E}{E}{E}{E}. When you do, destroy target nonbasic land defending player controls, and creatures that player controls without flying can't block this turn.

Legendary Creature — Human Advisor

When The Mouth of Sauron enters, target player mills three cards. Then amass Orcs X, where X is the number of instant and sorcery cards in that player's graveyard. (Put X +1/+1 counters on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)

Land — Sphere

{T}: Add {C}. {1}, {T}: Add one mana of any color. {X}, {T}: This land becomes a copy of target nontoken artifact you control with mana value X.

Legendary Creature — Plant

Landfall — Whenever a land you control enters, create a 0/1 green Plant creature token. If you control seven or more lands with different names, create a 2/2 black Zombie creature token instead. Land cards in your graveyard have dredge 2. (You may return a land card from your graveyard to your hand and mill two cards instead of drawing a card.)

Sorcery

Choose a creature at random. You gain control of that creature until end of turn. Untap it. It gains haste until end of turn. Then destroy all other creatures.

Legendary Artifact

Whenever a creature you control with a +1/+1 counter on it leaves the battlefield, create a Mutagen token for each +1/+1 counter on it. (A Mutagen token is an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.") {T}: Exile target card from a graveyard. Create a Mutagen token.

Enchantment — Saga

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.) I, II — Another target nonland permanent phases out. It can't phase in for as long as you control this Saga. III — Destroy all creatures. For each creature destroyed this way, its controller creates a 2/2 black Phyrexian creature token.

Legendary Artifact — Vehicle

Flying Whenever you cast a noncreature spell, if at least four mana was spent to cast it, The Prima Vista becomes an artifact creature until end of turn. Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)

Legendary Creature — Shapeshifter

If The Prismatic Piper is your commander, choose a color before the game begins. The Prismatic Piper is the chosen color. Partner (You can have two commanders if both have partner.)

Legendary Artifact — Vehicle

Flying Whenever another nontoken artifact you control enters, create a 2/2 white Human Knight creature token with "This token gets +2/+2 as long as an artifact entered the battlefield under your control this turn." Crew 2

Legendary Creature — Human Wizard

At the beginning of each end step, if a player discarded a card this turn, create a 1/1 black Bird creature token with flying and "This token can't block." {3}{B}, {T}: Each opponent discards a card. Activate only as a sorcery.

Enchantment — Saga

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Up to one target creature can't block for as long as you control this Saga. The Ring tempts you. II — Search your library for a Mountain card, put it onto the battlefield, then shuffle. III — Create Smaug, a legendary 6/6 red Dragon creature token with flying, haste, and "When Smaug dies, create fourteen Treasure tokens."

Legendary Artifact — Equipment

Equipped creature gets +1/+1 and has trample and "Whenever this creature deals combat damage to a player or planeswalker, create that many Treasure tokens." Equip {3}

Legendary Creature — Tyranid

Advanced Species — Whenever a red source you control deals damage to one or more permanents and/or players, put a +1/+1 counter on The Red Terror.

Legendary Artifact — Vehicle

Haste Whenever The Regalia attacks, reveal cards from the top of your library until you reveal a land card. Put that card onto the battlefield tapped and the rest on the bottom of your library in a random order. Crew 1

Sorcery

The Ring tempts you. Then reveal cards from the top of your library until you reveal X land cards, where X is the number of legendary creatures you control. Put those land cards onto the battlefield tapped and the rest on the bottom of your library in a random order.

Sorcery

Destroy target land. If that land was a snow land, you gain 1 life.

Legendary Creature — God

At the beginning of your upkeep, each opponent loses X life and you scry X, where X is the number of Zombies you control. {2}{U}{B}: Exile target creature card from a graveyard. Create a token that's a copy of it, except it's a 4/4 black Zombie. When The Scarab God dies, return it to its owner's hand at the beginning of the next end step.

Legendary Creature — God

Whenever a creature with a -1/-1 counter on it dies, draw a card. {1}{B}{R}: Put a -1/-1 counter on another target creature. When The Scorpion God dies, return it to its owner's hand at the beginning of the next end step.

Land — Sphere

{T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast Phyrexian creature spells. Corrupted — {T}: Target 1/1 creature gets +2/+1 until end of turn. Activate only if an opponent has three or more poison counters.

Legendary Enchantment

Creature spells you cast cost {2} less to cast. Whenever a creature you control enters, if you cast it, destroy that creature, then create a 2/2 black Zombie Druid creature token.

Legendary Creature — Demon

Flying, trample Start your engines! (If you have no speed, it starts at 1. It increases once on each of your turns when an opponent loses life. Max speed is 4.) At the beginning of your end step, you draw X cards and lose X life, where X is your speed.

Legendary Enchantment — Shrine

When The Spirit Oasis enters, draw a card for each Shrine you control. Whenever another Shrine you control enters, draw a card.

Land — Sphere

This land enters tapped. {T}: Add {U}. {1}{U}, {T}, Sacrifice this land: Draw a card.

Legendary Enchantment — Saga

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.) I, II, III — Mill two cards. If two cards that share a card type were milled this way, draw a card and repeat this process. IV — Exile any number of target instant, sorcery, and/or Tamiyo planeswalker cards from your graveyard. Copy them. You may cast any number of the copies.

Legendary Artifact

At the beginning of your upkeep, scry 2. Whenever you choose to put one or more cards on the bottom of your library while scrying, exile that many cards from the bottom of your library. During your turn, you may play cards exiled with The Temporal Anchor.

Sorcery

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Amass Orcs 2. (Put two +1/+1 counters on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)

Legendary Creature — Serpent

Flash Ward—Waterbend {4}. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {4}. They can tap their artifacts and creatures to help. Each one pays for {1}.) Whenever an opponent draws their second card each turn, you draw two cards.

Legendary Creature — Dragon Avatar

Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost {1} less to cast. Flying Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.

Legendary Creature — Human Bard

Lands you control enter untapped. The Minstrel's Ballad — At the beginning of combat on your turn, if you control five or more Towns, create a 2/2 Elemental creature token that's all colors. {3}{W}{U}{B}{R}{G}: Other creatures you control get +X/+X until end of turn, where X is the number of Towns you control.

Legendary Artifact Creature — God

Flying, trample, haste As long as there are fewer than eight cards in your graveyard, The Warring Triad isn't a creature. {T}, Mill a card: Target player adds one mana of any color.

Enchantment — Saga

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.) I — Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. II — Create a 1/1 green Saproling creature token. III — Domain — Target creature you control gets +X/+X and gains trample until end of turn, where X is the number of basic land types among lands you control.

Enchantment — Saga

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Destroy target creature an opponent controls with mana value 2 or less. II — Create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.") III — Create a Wicked Role token attached to target creature you control.

Legendary Creature — Human Hero

Flash Flying Wasp's Sting — When The Wondrous Wasp enters, tap up to one target creature. It loses all abilities for as long as The Wondrous Wasp remains on the battlefield.

Sorcery

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Creature — Eldrazi

Devoid (This card has no color.) When you cast this spell, exile up to one target noncreature, nonland permanent an opponent controls with mana value 4 or less. If you do, Thief of Existence gains "When this creature leaves the battlefield, target opponent draws a card."

Artifact — Equipment

Job select (When this Equipment enters, create a 1/1 colorless Hero creature token, then attach this to it.) Equipped creature gets +1/+1, has "Whenever this creature deals combat damage to a player, draw a card," and is a Rogue in addition to its other types. Equip {4}