Game On

Creature — Cat Nightmare

Mutate {2}{W/B}{W/B} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Whenever this creature mutates, return target creature card with mana value 3 or less from your graveyard to the battlefield.

Creature — Phyrexian Insect

Flying This creature enters with two oil counters on it. This creature gets +1/+1 for each oil counter on it. Whenever another creature or artifact you control is put into a graveyard from the battlefield, put an oil counter on this creature.

Creature — Spider

Reach

Sorcery

Needle Storm deals 4 damage to each creature with flying.

Creature — Drake

Flying, deathtouch

Creature — Human Warrior

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) You may exert this creature as it attacks. When you do, it gets +1/+2 until end of turn. (An exerted creature won't untap during your next untap step.)

Instant

Counter target noncreature spell.

Creature — Human Assassin

First strike When this creature enters, destroy target nonartifact, nonblack creature. That creature can't be regenerated.

Creature — Snake

This spell costs {1} less to cast for each creature card in your graveyard. {7}{G}{G}: Monstrosity 5. This ability costs {1} less to activate for each creature card in your graveyard. (If this creature isn't monstrous, put five +1/+1 counters on it and it becomes monstrous.)

Instant — Trap

If a white creature is attacking, you may pay {B}{B} rather than pay this spell's mana cost. Exile target attacking creature. Create a token that's a copy of that creature. Exile it at the beginning of the next end step.

Land

If a spell or ability an opponent controls causes you to discard a card, you may reveal that card and put it on top of your library instead of putting it anywhere else. {T}: Add {C}.

Creature — Human Rogue

{3}{U}, {T}: Exile another target creature you control, then return that card to the battlefield under your control.

Creature — Snake

Reach {6}{G}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)

Creature — Centaur Warrior

Creature — Beast

When this creature enters, look at the top X cards of your library, where X is the number of Forests you control. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Creature — Insect

At the beginning of combat on your turn, if you control another creature with power 4 or greater, put a +1/+1 counter on this creature.

Creature — Satyr Scout

Constellation — Whenever an enchantment you control enters, look at the top three cards of your library. You may reveal a land card from among them and put that card into your hand. Put the rest on the bottom of your library in a random order.

Creature — Phyrexian Zombie Warrior

Whenever a source deals damage to this creature, create a 2/2 black Phyrexian Zombie creature token.

Creature — Zombie

When this creature dies, create X tapped 1/1 green Squirrel creature tokens, where X is this creature's power.

Creature — Eldrazi Drone

When this creature enters, create a 0/1 colorless Eldrazi Spawn creature token. It has "Sacrifice this token: Add {C}."

Creature — Dinosaur

Haste

Creature — Spider

Reach (This creature can block creatures with flying.) Whenever this creature blocks a creature with flying, this creature gets +2/+0 until end of turn.

Creature — Eldrazi Drone

Devoid (This card has no color.) {T}: This creature deals 1 damage to each opponent. Whenever you cast a colorless spell, untap this creature.

Creature — Elf Warrior

This creature doesn't untap during your untap step. Whenever you cast a green spell, you may untap this creature.

Artifact Creature — Moonfolk Rogue

Flying When this creature enters, tap target permanent.

Artifact

{T}: Add one mana of any color. {1}, {T}, Tap another untapped artifact you control: Draw a card, then discard a card.

Creature — Human Wizard

This creature can't be blocked. When this creature enters, target creature can't be blocked this turn.

Creature — Human Rogue

This creature can't be blocked as long as defending player controls an artifact.

Instant

Counter target spell. Cycling {2} ({2}, Discard this card: Draw a card.)

Sorcery

Target opponent reveals their hand. You choose a nonland card from that player's graveyard or hand and exile it.

Sorcery // Sorcery

Creature — Dryad

{2}, Sacrifice this creature: Search your library for a basic Forest card, put it onto the battlefield tapped, then shuffle.

Land

This land enters tapped. When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.) {T}: Add {W}.

Enchantment — Aura

Enchant land When this Aura enters, put a +1/+1 counter on target creature you control. Enchanted land has "{T}: Add two mana of any one color."

Creature — Human Wizard

{W}{U}: Target creature gains flying until end of turn. {3}{W}{U}: Detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)

Creature — Satyr Archer

Reach Constellation — Whenever an enchantment you control enters, you gain 2 life.

Creature — Rat Warrior

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) This creature can't block.

Artifact Creature — Rat Ninja

Ninjutsu {1}{B} ({1}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) When this creature enters, target creature you control gains deathtouch and lifelink until end of turn.

Creature — Rat Samurai

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)

Creature — Rat Warrior

Sacrifice this creature: Destroy target Ninja.

Creature — Spirit

Flying Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Creature — Spirit

Flying {U}, {T}: You may tap or untap target creature.

Creature — Spirit

Flying When this creature enters, you may tap target creature.

Creature — Spirit

Flying Whenever this creature attacks, you may tap target creature.

Sorcery

Up to two target creatures can't block this turn. Flashback {3}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Creature — Human Warrior

When this creature enters, creatures your opponents control get -1/-1 until end of turn. Blitz {2}{B} (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

Instant // Instant

Creature — Human Soldier

First strike, vigilance

Instant

Target creature gets -X/-X until end of turn, where X is the number of cards in your hand.

Creature — Human Rogue

Whenever this creature becomes tapped, each opponent loses 1 life and you gain 1 life.

Creature — Vampire

This creature has haste as long as an opponent controls a Human.

Creature — Human Assassin

First strike When this creature enters, you may reveal X black cards in your hand. If you do, target creature gets -X/-X until end of turn. Madness {1}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)