Whenever an opponent attacks you, choose target creature attacking you. Put a stun counter on that creature.
: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

More Than Meets the Eye (You may cast this card converted for .)
Whenever Prowl attacks, exile up to one other target tapped creature or Vehicle. For as long as that card remains exiled, its owner may play it.
Whenever a player plays a card exiled with Prowl, you draw a card and convert Prowl.

Allons-y! — Whenever you attack, exile cards from the top of your library until you exile a nonland card. Put three time counters on it. If it doesn't have suspend, it gains suspend.
Timey-Wimey — : Time travel three times. Activate only as a sorcery. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter. Then do it two more times.)

(: Add .)

Destroy all lands.

Menace
Whenever Casey Jones attacks, put a +1/+1 counter on target attacking creature.
Whenever you put one or more +1/+1 counters on a creature you control, Casey Jones deals that much damage to target opponent.

Alliance — Whenever another creature you control enters, choose one that hasn't been chosen this turn —
• Add .
• Put a +1/+1 counter on each creature you control.
• Scry 2, then draw a card.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
: Add , , or .

Sunburst (This artifact enters with a charge counter on it for each color of mana spent to cast it.)
, Sacrifice this artifact: Destroy each nonland permanent with mana value equal to the number of charge counters on this artifact.

Sacrifice a creature: This enchantment deals 1 damage to any target.

Flying
Whenever Ultron enters or attacks, create a 2/2 colorless Robot Villain artifact creature token.
Whenever another artifact is put into your graveyard from the battlefield or an artifact card is put into your graveyard from anywhere other than the battlefield, each opponent loses 1 life.

If you would draw a card while your library has no cards in it, you win the game instead.
+1: Target player mills two cards. Draw a card.
−8: Draw seven cards. Then if your library has no cards in it, you win the game.

When Skyship Weatherlight enters, search your library for any number of artifact and/or creature cards, exile them, then shuffle.
, : Choose a card at random that was exiled with Skyship Weatherlight. Put that card into its owner's hand.

When you cast this spell, you may return target Angel or Human creature card from your graveyard to the battlefield.
Flying, vigilance
(Melds with Gisela, the Broken Blade.)

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

You may exile a blue card from your hand rather than pay this spell's mana cost.
Change the target of target spell with a single target.

Landfall — Whenever a land you control enters, add one mana of any color.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Copy target instant or sorcery spell. You may choose new targets for the copy.

Equipped creature gets +1/+1 and has trample and lifelink.
: Permanents your opponents control lose hexproof and indestructible until end of turn.
Equip

(: Add .)