Corrupt — Destroy target creature if it has power 3 or less or if you control a permanent with greater mana value than this spell.

Level up {2}{B}
[level 1-2] This creature gets +1/+1 for each creature and/or enchantment card in your graveyard.
[level 3+] This creature gets +1/+1 for each creature and/or enchantment card in all graveyards.

Destroy target creature or enchantment. You lose life equal to its mana value.

Level up {R/W}
[level 1-2] Whenever a nontoken creature you control with a counter on it dies, create a 1/1 white Citizen creature token.
[level 3+] Whenever a nontoken creature you control with a counter on it dies, create a 4/4 red Error creature token with menace.

As an additional cost to cast this spell, remove a level counter from a creature you control or pay {3}.
Exile target creature or planeswalker. Surveil 2.

Corrupt — All creatures get -2/-2 until end of turn. If you control a permanent with greater mana value than this spell, instead creatures your opponents control get -2/-2 until end of turn.

When this creature enters, target player separates their hand into a face-up pile and a face-down pile. Choose one of those piles, reveal it, and choose a nonland card from it. Exile that card until this creature leaves the battlefield.

When this creature enters or leaves the battlefield, exchange your graveyard and library, then shuffle.
Whenever a creature dies, draw a card.

Level up {1}{G}
[level 1-3] At the beginning of your end step, target player mills two cards.
[level 4+] At the beginning of your end step, target player mills five cards.

Menace
Swampcycling {2}

This spell costs {2} less to cast if you control a creature with a level counter on it.
Flying

Target creature gets -2/-2 until end of turn. Its controller mills two cards.

You may pay {1}{B} rather than pay this spell's mana cost. When you do, target opponent creates two 1/1 white Citizen creature tokens.

Lifelink
Corrupt — When this creature enters, return target creature card from your graveyard to your hand. If you cast this creature and you control a permanent with greater mana value than this creature, return that card to the battlefield instead.

Choose up to X, where X is one plus the number of creatures you control with level counters on them.
• Each opponent discards two cards.
• Creatures your opponents control get -1/-1 until end of turn.
• Each opponent loses 3 life and you gain 3 life.

When this creature dies, create a black Subroutine enchantment token named TICK with “Whenever this Subroutine runs, each opponent loses 1 life and you gain 1 life.”
{1}{B}: Return this card from your graveyard to the battlefield tapped. Activate only if a card left your graveyard this turn.

Corrupt — When this creature enters, mill three cards. If you control a permanent with greater mana value than this creature, you may cache a creature card from your graveyard.

This spell costs {1} less to cast for each creature and/or enchantment card in your graveyard.
Ward—Discard a card.

When this Subroutine enters, you create two 1/1 black Jellyfish enchantment creature tokens with flying, draw two cards, and gain 2 life.
Whenever this Subroutine leaves the battlefield or runs, you sacrifice a creature, discard a card, and lose 1 life.

Whenever this Subroutine runs, you draw three cards and you lose 3 life.

Level up {3}{B}
[level 1-3] Menace
[level 4+] Menace

Target opponent reveals their hand. You choose a nonland card with mana value 2 or less from it or a card from their graveyard. Exile that card.

As an additional cost to cast this spell, sacrifice a creature or enchantment.
Flying
When this creature enters, each opponent sacrifices a creature of their choice, then sacrifices an enchantment of their choice.

Whenever this Subroutine runs, draw two cards. Creatures your opponents control get -2/-0 until your next turn.

When this enchantment enters, cache any number of cards from your hand face down.
Whenever you cast a cached spell, copy it. You may choose new targets for the copy.