Darksteel

Target creature gets +1/+0 until end of turn for each artifact you control.

Look at the top X cards of your library, where X is the number of artifacts you control. Put one of those cards into your hand and the rest on the ...

Equipped creature has "{T}, Unattach Leonin Bola: Tap target creature." Equip {1} ({1}: Attach to target creature you control. Equip only as a sorc...

Counter target spell. That spell's controller may draw a card.

Affinity for Swamps (This spell costs {1} less to cast for each Swamp you control.) Fear (This creature can't be blocked except by artifact creatur...

Flying Modular 1 (This creature enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact ...

{1}, {T}: Add one mana of any color.

Target creature and all other creatures with the same name as that creature get -2/-2 until end of turn.

Scavenging Scarab can't block.

Whenever a player casts an artifact spell, that player gains control of Drooling Ogre. (This effect lasts indefinitely.)

Destroy target enchantment and all other enchantments with the same name as that enchantment.

Target player loses 1 life for each tapped artifact they control.

Protection from artifacts

Flash (You may cast this spell any time you could cast an instant.) Reach (This creature can block creatures with flying.)

Artifact creatures you control gain flying until end of turn.

As long as Auriok Glaivemaster is equipped, it gets +1/+1 and has first strike.

Prevent all damage target spell would deal this turn. You gain life equal to the damage prevented this way.

Flying Sacrifice Pteron Ghost: Regenerate target artifact.

Target creature and all other creatures with the same name as that creature get -2/-2 until end of turn.

Flying Discard an artifact card: Return Neurok Prodigy to its owner's hand.

Destroy target artifact and all other artifacts with the same name as that artifact.

Return target artifact card from your graveyard to your hand.

Haste Modular 2 (This creature enters the battlefield with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifac...

Destroy target Equipment. If that Equipment was attached to a creature, Unforge deals 2 damage to that creature.