MTG

At the beginning of your upkeep, put a doom counter on Armageddon Clock. At the beginning of your draw step, Armageddon Clock deals damage equal to...

{T}: Add {C}. {T}, Sacrifice Strip Mine: Destroy target land.

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

You may choose not to untap Ashnod's Battle Gear during your untap step. {2}, {T}: Target creature you control gets +2/-2 for as long as Ashnod's B...

Enchant artifact Enchanted artifact's activated abilities cost {2} less to activate. This effect can't reduce the amount of mana an ability costs t...

When Onulet dies, you gain 2 life.

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

Counter target artifact spell.

Sacrifice an artifact. If you do, search your library for an artifact card. If that card's converted mana cost is less than or equal to the sacrifi...

Gaea's Avenger's power and toughness are each equal to 1 plus the number of artifacts your opponents control.

Players can't untap more than one artifact during their untap steps.

{2}: The next time an artifact source of your choice would deal damage to you this turn, prevent that damage.

Whenever an artifact becomes tapped or a player activates an artifact's ability without {T} in its activation cost, Haunting Wind deals 1 damage to...

{W}{W}, {T}: Return target artifact card from your graveyard to your hand.

As The Rack enters the battlefield, choose an opponent. At the beginning of the chosen player's upkeep, The Rack deals X damage to that player, whe...

Sacrifice a creature: Add {C}{C}.

{T}, Sacrifice an artifact: Add an amount of {B} equal to the sacrificed artifact's converted mana cost.

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

Vigilance

Flying Tetravus enters the battlefield with three +1/+1 counters on it. At the beginning of your upkeep, you may remove any number of +1/+1 counter...

Remove Bronze Tablet from your deck before playing if you're not playing for ante. Bronze Tablet enters the battlefield tapped. {4}, {T}: Exile Bro...

As Shapeshifter enters the battlefield, choose a number between 0 and 7. At the beginning of your upkeep, you may choose a number between 0 and 7. ...

When Su-Chi dies, add {C}{C}{C}{C}.

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.