Scavenge (, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

When this creature leaves the battlefield, you draw two cards and each opponent draws a card.

Casualty 1 (As you cast this spell, you may sacrifice a creature with power 1 or greater. When you do, copy this spell.)
Mill two cards, then you may return a creature card from your graveyard to your hand. (To mill a card, put the top card of your library into your graveyard.)

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

When this creature enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Whenever you cast an instant or sorcery spell, Muddle becomes a copy of up to one target nonlegendary creature you control until end of turn, except it has myriad. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

When this artifact is put into a graveyard from the battlefield, reveal the top thirteen cards of your library. Put a random creature card from among them onto the battlefield. Put the rest on the bottom of your library in a random order.

Flying
Vigilance (Attacking doesn't cause this creature to tap.)

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
As long as Thundering Mightmare is paired with another creature, each of those creatures has "Whenever an opponent casts a spell, put a +1/+1 counter on this creature."

Enchant creature
When this Aura enters, tap enchanted creature.
As long as you control another snow permanent, enchanted creature doesn't untap during its controller's untap step.

Ninjutsu
This creature enters with a menace counter on it.
Whenever this creature deals combat damage to a player, you may remove a menace counter from it. When you do, that player reveals their hand and you choose a nonland card from it. Exile that card.

: Prevent the next 1 damage that would be dealt to target creature this turn.

(: Add .)

Return all attacking creatures to their owner's hand.

Counter target spell. Its controller mills three cards.

, Sacrifice this creature: Destroy target artifact or enchantment.

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 1-2
2/3
: This creature deals 1 damage to any target.
LEVEL 3+
2/4
: This creature deals 3 damage to any target.

Trample
At the beginning of your end step, put a +1/+1 counter on this creature for each opponent who was dealt damage this turn.

Look at the top five cards of your library. You may reveal a colorless card from among them and put it into your hand. Then put the rest on the bottom of your library in any order.

Heroic — Whenever you cast a spell that targets this creature, you may tap target creature.