Terracrux

Artifact

{1}, Sacrifice this artifact: Draw a card. {2}{U}, Sacrifice this artifact: Return target creature to its owner's hand. Draw a card. Activate only as a sorcery.

Enchantment — Room // Enchantment — Room

Creature — Kithkin Citizen

{T}: Target creature you control gets +1/+1 and gains vigilance until end of turn. Activate only as a sorcery.

Legendary Creature — Human Warrior

Flash This spell can't be countered. Creature spells you control can't be countered. Other creatures you control have trample.

Creature — Giant Wizard

As an additional cost to cast this spell, reveal a Giant card from your hand or pay {2}. Whenever this creature attacks, you may cast an instant or sorcery spell from your hand without paying its mana cost.

Land

When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.) {T}: Add {C}. {1}, {T}: Add one mana of any color.

Creature — Faerie Rogue

Flying When this creature dies, you may draw a card.

Sorcery

You gain 2 life. Then if you have more life than an opponent, draw a card. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Instant

Target creature gets +1/+0 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.) Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Creature — Human Wizard

Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) {T}: Draw two cards, then put a card from your hand on top of your library.

Instant

Exile target nonland permanent and the top card of your library. For each of those cards, its owner may play it until the end of their next turn.

Sorcery

This spell costs {3} less to cast if you've sacrificed an artifact this turn. This spell can't be countered. (This includes by the ward ability.) Suspicious Detonation deals 4 damage to target creature.

Instant

Choose target spell. Surveil 2, then counter the chosen spell unless its controller pays {1} for each card in your graveyard. (To surveil 2, look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Basic Land — Swamp

({T}: Add {B}.)