Vigilance, haste

Destroy target creature. Its controller loses 2 life and you gain 2 life.

Flying
Protection from red
Sacrifice this creature: Counter target spell that targets you.

Flying
: This creature's owner shuffles it into their library.

Target creature becomes blue until end of turn. Untap that creature.
Draw a card.

Flying, protection from green

Enchant creature
Enchanted creature can't attack.
When this Aura is put into a graveyard from the battlefield, return it to its owner's hand.

, : Target creature gets +2/+0 until end of turn.
, : Add one mana of any color.

At the beginning of your upkeep, if you control a red or green permanent, draw a card, then discard a card. If you control a red permanent and a green permanent, instead draw two cards, then discard a card.

Kicker and/or (You may pay an additional and/or as you cast this spell.)
If this creature was kicked with its kicker, it enters with two +1/+1 counters on it and with first strike.
If this creature was kicked with its kicker, it enters with a +1/+1 counter on it and with trample.

When this creature enters, mill two cards, then put a +1/+1 counter on this creature for each artifact and/or creature card in your graveyard.

When this creature enters, create a 2/1 red Klingon Warrior creature token with haste.

Freerunning
Destroy target creature. If another creature died this turn, draw a card.

Animate Chains — When this creature enters, each player sacrifices a nontoken creature of their choice.

Medium Fiend (devil), Challenge 8
Armor class 16, Hit Points 85
Speed 30 ft.
Attacks Chain, Animate Chains, Unnerving Mask
STR 18 (+4) DEX 15 (+2) CON 18 (+4)
INT 11 (+0) WIS 12 (+1) CHA 14 (+2)

Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay . If the player does, they may copy this spell and may choose a new target for that copy.

Destroy target noncreature permanent. Then that permanent's controller may copy this spell and may choose a new target for that copy.

Chain of Plasma deals 3 damage to any target. Then that player or that permanent's controller may discard a card. If the player does, they may copy this spell and may choose a new target for that copy.

Prevent all damage target creature would deal this turn. That creature's controller may sacrifice a land of their choice. If the player does, they may copy this spell and may choose a new target for that copy.

Target player discards two cards. That player may copy this spell and may choose a new target for that copy.

Return target nonland permanent to its owner's hand. Then that permanent's controller may sacrifice a land of their choice. If the player does, they may copy this spell and may choose a new target for that copy.

Chain Reaction deals X damage to each creature, where X is the number of creatures on the battlefield.

You may tap or untap target creature. Then that creature's controller may pay . If the player does, they may copy this spell and may choose a new target for that copy.

Target creature gets -4/-0 until end of turn. Scry 2.

This creature enters with two -1/-1 counters on it.
, : Remove a -1/-1 counter from target creature.

This creature doesn't untap during your untap step.
, Sacrifice another creature: Untap this creature. Activate only during your turn.

Infect
This creature can't attack unless defending player is poisoned.

Enchant Mountain you control
When this Aura enters, exile target creature an opponent controls until this Aura leaves the battlefield. (That creature returns under its owner's control.)

All Nightmares get +1/+1.
, Pay 3 life: Put target creature card from a graveyard onto the battlefield under your control. That creature is black and is a Nightmare in addition to its other creature types.
When Chainer leaves the battlefield, exile all Nightmares.