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.

Corrupt — Each player exiles the top X cards of their library. You may cast a spell from among them with mana value X or less without paying its mana cost. If you control a permanent with greater mana value than this spell, you may cast up to two spells with mana value X or less from among them without paying their mana costs instead.

Choose one —
• Target opponent reveals their hand. You choose a nonland card from it and exile that card.
• Target opponent exiles a creature or enchantment they control.

This spell costs {1} less to cast for each creature you control.
Trample
When this creature enters, you may discard a card. If you do, draw two cards.

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.

Create two 1/1 blue Bird creature tokens with flying, then create a token that's a copy of a token you control.

Trample
This creature gets +1/+0 for each counter among creatures you control.
{2}{R}{G}: Put a +1/+1 counter on this creature.

Whenever you cast a noncreature spell, create a 1/1 blue Bird creature token with flying.
Flow — {10}{W}{U}: Draw cards equal to half the number of cards in your library, rounded up.

Ward {2}
If you would put one or more counters on a permanent or player, put three times as many of each of those kinds of counters on that permanent or player instead.

Trample
Whenever a creature you control attacks alone, put four +1/+1 counters on it.

Ward {2}
Whenever one or more nontoken creatures you control leave the battlefield without dying, create a 1/1 blue Ninja creature token with “This creature can't be blocked by creatures with greater power.”

Menace, lifelink
Whenever a tapped creature you control dies, draw a card.

At the beginning of combat on your turn, put a +1/+1 counter on another target creature you control.
Once during each of your turns, you may cast a creature spell from your graveyard by removing a number of counters from among creatures you control equal to that spell's mana value in addition to paying its other costs.

Flying
Level up {3}{W}{W}
[level 1-2] Flying
[level 3+] Flying

Whenever a nontoken creature you control enters, surveil 1.
{G}, Exile this enchantment: Return target card from your graveyard to your hand. Activate only as a sorcery.

Deathtouch

Whenever another nontoken permanent you control is returned to hand, you may create a token that's a copy of it. Do this only once each turn.
Each creature card with mana value 3 or less in your hand has ninjutsu {G}{U}.

At the end of combat on your turn, you may sacrifice another creature. If you do, Aoushun's Presence deals 2 damage to each opponent that creature attacked this turn and you draw a card.
{B}{R}: Aoushun's Presence becomes a 3/2 Dragon creature with flying in addition to its other types.

When this creature enters, create a Treasure token.
Whenever you sacrifice an artifact or enchantment, this creature gets +2/+0 and gains trample until end of turn.

When this creature enters, mill three cards, then you may exile an instant, sorcery, or Subroutine card from your graveyard. You may cast a copy of that card. If you don't, cache it.

Cards in graveyards lose all abilities.
{1}: Put target card from a graveyard on the bottom of its owner's library. Activate only as a sorcery.
Cycling {2}

Level up {2}{U}
[level 1-2]
[level 3+] Flying

This land enters tapped.
Level up {U}{U}{U}
[level 1-2] Vigilance
This land is also a creature.
[level 3+] Vigilance
This land is also a creature.

When this land enters, sacrifice it. If you do, search your library for a basic Mountain or Forest card, put it onto the battlefield tapped, then shuffle.
{1}{R}{R}{G}{G}, Discard this card: Target creature you control gets +2/+0 until end of turn. It deals damage equal to its power to up to one target creature you don't control.

Level up {G/U}
[level 3-5] Whenever this creature deals damage to a player, draw a card.
[level 6+] Whenever a creature you control deals damage to a player, draw a card.