Flying

: Add . If you control an Urza's Mine and an Urza's Tower, add instead.

: Add . If you control an Urza's Power-Plant and an Urza's Tower, add instead.

: Add . If you control an Urza's Mine and an Urza's Power-Plant, add instead.

Counter target artifact spell.

Return target artifact card from your graveyard to your hand.

Put any number of target artifact cards from target player's graveyard on top of their library in any order.

Whenever an artifact you control is put into a graveyard from the battlefield, you may pay . If you do, you gain 1 life.

Enchant creature
Enchanted creature can't be blocked by artifact creatures.
Prevent all damage that would be dealt to enchanted creature by artifact sources.
Enchanted creature can't be the target of abilities from artifact sources.

Destroy target artifact. It can't be regenerated. That artifact's controller gains life equal to its mana value.

Whenever a player casts an artifact spell, you may pay . If you do, you gain 1 life.

Sacrifice an artifact: Atog gets +2/+2 until end of turn.

Argothian Pixies can't be blocked by artifact creatures.
Prevent all damage that would be dealt to Argothian Pixies by artifact creatures.

, : Prevent the next 1 damage that would be dealt to any target this turn.

, Sacrifice an artifact: Draw a card.

, Sacrifice an artifact: Add an amount of equal to the sacrificed artifact's mana value.

You gain X life, where X is twice the damage dealt to you so far this turn by artifacts.

At the beginning of combat on your turn, Battering Ram gains banding until end of combat. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's blocking.)
Whenever Battering Ram becomes blocked by a Wall, destroy that Wall at end of combat.

: Dragon Engine gets +1/+0 until end of turn.

You may choose not to untap Phyrexian Gremlins during your untap step.
: Tap target artifact. It doesn't untap during its controller's untap step for as long as Phyrexian Gremlins remains tapped.

Vigilance

Enchant artifact
Whenever enchanted artifact becomes tapped or a player activates an ability of enchanted artifact without in its activation cost, Artifact Possession deals 2 damage to that artifact's controller.

, Sacrifice an artifact: Orcish Mechanics deals 2 damage to any target.

: Prevent the next 2 damage that would be dealt to target artifact creature this turn.

: Grapeshot Catapult deals 1 damage to target creature with flying.

: Regenerate Clay Statue.

, : Target creature gets -2/-0 until end of turn.

Prevent all damage that would be dealt to Argothian Treefolk by artifact sources.