Target creature gets -4/-0 until end of turn.
Investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")

, Discard a card: Create a 1/1 black Vampire Knight creature token with lifelink. Activate only once each turn.

Haste
: This creature gets +2/+0 until end of turn.

Discard a card: This creature gains flying until end of turn.

: Add or .
Delirium — This creature has deathtouch as long as there are four or more card types among cards in your graveyard.

Defender
This creature enters with four ice counters on it.
Whenever you cast an instant or sorcery spell, remove an ice counter from this creature. Then if it has no ice counters on it, transform it.

When this creature enters, put a +1/+1 counter on target creature.
Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, put a +1/+1 counter on target creature.

Choose target creature you don't control. Each creature you control that's a Wolf or a Werewolf deals damage equal to its power to that creature.

Target creature gets +3/+1 and gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Flash
Flying
When this creature enters, target Spirit gains hexproof until end of turn.
You may cast Spirit spells as though they had flash.

Return up to two target creature cards from your graveyard to your hand, then discard a card.

Menace (This creature can't be blocked except by two or more creatures.)
When this creature dies, you may pay . If you do, return it to its owner's hand.
When this creature dies, you may pay . If you do, return another target Zombie creature card with mana value X from your graveyard to the battlefield.

This creature can't attack or block unless a player has no cards in hand.

Trample
Whenever this creature deals combat damage to a player, surveil 3. (Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
Delirium — This creature gets +2/+2 as long as there are four or more card types among cards in your graveyard.

When this creature enters, target creature gets +1/+1 until end of turn.

At the beginning of combat on your turn, if you both own and control this creature and a creature named Midnight Scavengers, exile them, then meld them into Chittering Host.

Exile target creature and all other creatures its controller controls with the same name as that creature. That player investigates for each nontoken creature exiled this way.

First strike, lifelink
At the beginning of the end step, if you gained 3 or more life this turn, transform this creature.

Return target nonland permanent to its owner's hand. Then that player discards a card if you control a Zombie.

At the beginning of each upkeep, if no spells were cast last turn, transform this creature.

Whenever this creature attacks or blocks, other Humans you control get +1/+1 until end of turn.

Escalate—Discard a card. (Pay this cost for each mode chosen beyond the first.)
Choose one or more —
• Target opponent reveals their hand. You choose an instant or sorcery card from it. That player discards that card.
• Target creature gets -2/-2 until end of turn.
• Target opponent loses 2 life and you gain 2 life.

When you sacrifice a Clue, transform this creature.

Creatures without flying can't block this turn.

Menace (This creature can't be blocked except by two or more creatures.)

Discard a card: Vampires you control get +1/+1 until end of turn. Activate only once each turn.

Draw a card, then draw cards equal to the number of cards named Take Inventory in your graveyard.

Flying
Whenever you investigate for the first time each turn, investigate an additional time.

Creatures you control have ": Add one mana of any color."

Whenever one or more creatures you control deal combat damage to a player, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")
, Exile a creature card from your graveyard: Investigate. You gain 2 life.

Defender
: This creature deals 1 damage to each opponent.
Whenever you cast an instant or sorcery spell, untap this creature.

When this creature enters, each opponent mills three cards.
Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, that player mills three cards.

: Add . Spend this mana only to cast an instant or sorcery spell.
At the beginning of your upkeep, if there are three or more instant and/or sorcery cards in your graveyard, transform this creature.

Skulk (This creature can't be blocked by creatures with greater power.)
Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card.
Whenever you discard a creature card, you may pay . If you do, create a 3/2 colorless Eldrazi Horror creature token.