InQuest

Flying
Changeling
Borg Cube's power and toughness are each equal to the number of creature cards in all graveyards.
At the beginning of your upkeep, mill X cards, where X is Borg Cube's toughness.

Cthulhu can't attack or block.
At the beginning of your upkeep, put an insanity counter on each creature.
When a creature has a number of insanity counters on it equal to its toughness, that creature deals damage to its controller equal to its power and then exile that creature.

When Imhotep, the Mummy becomes the target of a spell of ability, you may return Imhotep to your hand.
When Imhotep deals combat damage to a player, reveal the top card of your library. You may play that card without paying its mana cost. If you don't, put that card into your graveyard. If that card's mana cost includes , you must choose 1 instead of 0 as the value of X.

At the beginning of your upkeep, if Lim Dul's Ex is in your graveyard, return it to the battlefield.
You cannot tap nonland permanents to pay costs.
As a special action, Lim Dul's Ex's owner can sacrifice half of the permanents they control, rounding up, and exile Lim Dul's Ex.

: If the number of creatures you control that you have gained control of in this way is less than the number of permanents named Mind Flayer, gain control of target creature with mana value less than four. That creature loses all abilities until you lose control of it.
, Sacrifice a creature that you gained control of in this way: Add a number of colorless manas into your mana pool equal to the mana value of the sacrificed creature.

: Create a 2/2 white and black ? creature token with haste and "at the beginning of each end step, sacrifice this creature". Only active players can use this ability and only during that player's upkeep.

: Return Pinhead to owner's hand. Pinhead's controller draws a card or puts the top card of their library into their hand. Only an opponent of Pinhead's controller can activate this ability.

First strike
At the beginning of your upkeep, reveal cards from the top of your library until a black creature card is revealed. Put that card into the battlefield and shuffle the rest into your library.
At the beginning of your precombat main phase, destroy target black creature. It can't be regenerated.

You can cast Snake Bite only during combat.
When target creature you control dies this turn during a combat damage step and combat damage has been dealt to that creature this turn, destroy all creatures controlled by opponents that share a color with that creature.