Mirrodin

Whenever equipped creature blocks or becomes blocked by a creature, destroy both creatures. Equip {2} ({2}: Attach to target creature you control. ...

Activated abilities of artifacts and creatures can't be activated unless they're mana abilities.

At the beginning of your upkeep, destroy target nonland permanent with the lowest mana value. (If two or more permanents are tied for lowest, targe...

{3}, {T} or {U}, {T}: Return target creature to its owner's hand unless its controller pays {1}.

{T}: Add {G}.

{1}{U}: Cobalt Golem gains flying until end of turn.

Flying Clockwork Dragon enters the battlefield with six +1/+1 counters on it. Whenever Clockwork Dragon attacks or blocks, remove a +1/+1 counter f...

Flying Clockwork Condor enters the battlefield with three +1/+1 counters on it. Whenever Clockwork Condor attacks or blocks, remove a +1/+1 counter...

Clockwork Beetle enters the battlefield with two +1/+1 counters on it. Whenever Clockwork Beetle attacks or blocks, remove a +1/+1 counter from it ...

Imprint — When Chrome Mox enters the battlefield, you may exile a nonartifact, nonland card from your hand. {T}: Add one mana of any of the exiled...

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

Chalice of the Void enters the battlefield with X charge counters on it. Whenever a player casts a spell with mana value equal to the number of cha...

When Cathodion dies, add {C}{C}{C}.

Sacrifice Bottle Gnomes: You gain 3 life.

Trample {3}{R}, Sacrifice an artifact: Bosh, Iron Golem deals damage equal to the sacrificed artifact's mana value to any target.

Equipped creature gets +2/+0. Equip {1}

At the beginning of each player's precombat main phase, if Blinkmoth Urn is untapped, that player adds {C} for each artifact they control.

Equipped creature gets +1/+1 for each charge counter on Banshee's Blade. Whenever equipped creature deals combat damage, put a charge counter on B...

At the beginning of your precombat main phase, add {B} for each charge counter on Altar of Shadows. {7}, {T}: Destroy target creature. Then put a c...

{U}, Sacrifice Aether Spellbomb: Return target creature to its owner's hand. {1}, Sacrifice Aether Spellbomb: Draw a card.