Adorable Kitten

When this creature enters, roll a six-sided die. You gain life equal to the result.

Angelic Rocket

Flying
When this creature enters, you may destroy target nonland permanent.

Accessories to Murder

Whenever you crank this Contraption, target creature gets +X/+0 until end of turn, where X is the number of creatures you control.

Amateur Auteur

Sacrifice this creature: Destroy target enchantment.

Mox Lotus

{T}: Add {∞}.
{100}: Add one mana of any color.

Aerial Toastmaster

Flying
{3}{W}, Sacrifice another artifact: This creature assembles a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)

Animate Library

Enchant your library
Enchanted library is an artifact creature on the battlefield with power and toughness each equal to the number of cards in it. It's still a library.
If enchanted library would leave the battlefield, exile this Aura instead.

"Rumors of My Death . . ."

{3}{B}, Exile a permanent you control with a League of Dastardly Doom watermark: Return a permanent card with a League of Dastardly Doom watermark from your graveyard to the battlefield.