Enervate

Tap target artifact, creature, or land.
Draw a card at the beginning of the next turn's upkeep.

Ornithopter

Ankh of Mishra

Whenever a land enters, this artifact deals 2 damage to that land's controller.

Counterspell

Bronze Horse

Trample
As long as you control another creature, prevent all damage that would be dealt to this creature by spells that target it.

Tinker

As an additional cost to cast this spell, sacrifice an artifact.
Search your library for an artifact card, put that card onto the battlefield, then shuffle.

Accumulated Knowledge

Draw a card, then draw cards equal to the number of cards named Accumulated Knowledge in all graveyards.

Aladdin's Ring

{8}, {T}: This artifact deals 4 damage to any target.

Chromatic Sphere

{1}, {T}, Sacrifice this artifact: Add one mana of any color. Draw a card.

Animate Artifact

Enchant artifact
As long as enchanted artifact isn't a creature, it's an artifact creature with power and toughness each equal to its mana value.