Cara Mitten

Quicksilver Behemoth

Affinity for artifacts (This spell costs {1} less to play for each artifact you control.)
When Quicksilver Behemoth attacks or blocks, return it to its owner's hand at end of combat. (Return it only if it's in play.)

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
When this creature attacks or blocks, return it to its owner's hand at end of combat. (Return it only if it's on the battlefield.)

Harbinger of Spring

Protection from non-Spirit creatures
Soulshift 4 (When this is put into a graveyard from play, you may return target Spirit card with converted mana cost 4 or less from your graveyard to your hand.)

Protection from non-Spirit creatures
Soulshift 4 (When this creature dies, you may return target Spirit card with mana value 4 or less from your graveyard to your hand.)

Mycosynth Lattice

All permanents are artifacts in addition to their other types.
All cards that aren't on the battlefield, spells, and permanents are colorless.
Players may spend mana as though it were mana of any color.

"The husk splits like a madman's smile And mystery steps forth."
—Snow-Fur, kitsune poet

Lifespinner

{T}, Sacrifice three Spirits: Search your library for a legendary Spirit permanent card, put it onto the battlefield, then shuffle.

Opaline Bracers

Sunburst (This artifact enters with a charge counter on it for each color of mana spent to cast it.)
Equipped creature gets +X/+X, where X is the number of charge counters on this Equipment.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

In the swirling mists, you could walk right up to one and not know until its teeth are in your throat.

Nim Grotesque

This creature gets +1/+0 for each artifact you control.

Æther portals drift across Mirrodin's surface, dragging creatures across time and space.

Fold into Aether

Counter target spell. If that spell is countered this way, its controller may put a creature card from their hand onto the battlefield.

Ferocious Charge

Target creature gets +4/+4 until end of turn. 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.)