Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.

Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

Sacrifice a creature: Add .

Equipped creature gets +1/+1 for each land you control.

Equip legendary creature

Equip

, Sacrifice this creature: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Lands you control have ": Add one mana of any color."

: Add one mana of any color.

As Cloud Key enters, choose artifact, creature, enchantment, instant, or sorcery.

Spells you cast of the chosen type cost less to cast.

Door to Nothingness enters tapped.

, , Sacrifice Door to Nothingness: Target player loses the game.

Artifact spells you cast cost less to cast.

, : Reveal cards from the top of your library until you reveal a land card. Goblin Charbelcher deals damage equal to the number of nonland cards revealed this way to any target. If the revealed land card was a Mountain, Goblin Charbelcher deals double that damage instead. Put the revealed cards on the bottom of your library in any order.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for .)

, : Draw a card, then discard a card.

, : Target player mills X cards, where X is the number of cards in that player's graveyard.

: Target permanent becomes an artifact in addition to its other types until end of turn.

, Put a page counter on this artifact: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

, , Put a page counter on this artifact: Draw a card.

When there are four or more page counters on this artifact, exile it. If you do, you gain 4 life.

, : Target player mills two cards.

, Sacrifice Mishra's Bauble: Look at the top card of target player's library. Draw a card at the beginning of the next turn's upkeep.

You may look at the top card of your library any time.

You may cast artifact spells and colorless spells from the top of your library.

, Pay 1 life: Exile the top card of your library.

, , Exile Perilous Vault: Exile all nonland permanents.

As Phyrexian Revoker enters, choose a nonland card name.

Activated abilities of sources with the chosen name can't be activated.

When Precursor Golem enters, create two 3/3 colorless Golem artifact creature tokens.

Whenever a player casts an instant or sorcery spell that targets only a single Golem, that player copies that spell for each other Golem that spell could target. Each copy targets a different one of those Golems.

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand.

Whenever you draw a card, each opponent loses 1 life.

Equipped creature has deathtouch.

Whenever equipped creature deals combat damage to a player, that player loses half their life, rounded up.

Equip

Equipped creature has first strike and gets +X/+0, where X is the number of instant and sorcery cards in your graveyard.

Equip

You may have Sculpting Steel enter as a copy of any artifact on the battlefield.

Imprint — When Semblance Anvil enters, you may exile a nonland card from your hand.

Spells you cast that share a card type with the exiled card cost less to cast.

When this artifact enters, exile target card from a graveyard.

, Sacrifice this artifact: Exile each opponent's graveyard.

, , Sacrifice this artifact: Draw a card.

: Untap Staff of Domination.

, : You gain 1 life.

, : Untap target creature.

, : Tap target creature.

, : Draw a card.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and no matter when it came under your control.)

Equip (: Attach to target creature you control. Equip only as a sorcery.)

Noncreature spells cost more to cast.

Whenever you gain life, you may pay , where X is less than or equal to the amount of life you gained. If you do, draw X cards.