You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

When Ichor Wellspring enters the battlefield or is put into a graveyard from the battlefield, draw a card.

{2}, {T}, Discard your hand: Counter target noncreature spell.

{3}, {T}: Retributive Wand deals 1 damage to any target. When Retributive Wand is put into a graveyard from the battlefield, it deals 5 damage to any target.

{T}, Sacrifice up to three permanents: If there were three or more card types among the sacrificed permanents, each opponent loses 3 life, you gain 3 life, and you draw three cards.

At the beginning of your end step, you may sacrifice an artifact, creature, enchantment, land, or planeswalker. If you do, each opponent may sacrifice a permanent that shares a card type with it. For each opponent who doesn't, that player loses 2 life and you draw a card.

When Circuit Mender enters the battlefield, you gain 2 life. When Circuit Mender leaves the battlefield, draw a card.

When Clockwork Fox leaves the battlefield, you draw two cards and each opponent draws a card.

Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.) When Ertai's Familiar phases out or leaves the battlefield, mill three cards. {U}: Until your next upkeep, Ertai's Familiar can't phase out.

Trample When Gluttonous Troll enters the battlefield, create a number of Food tokens equal to the number of opponents you have. (Food tokens are artifacts with "{2}, {T}, Sacrifice this artifact: You gain 3 life.") {1}{G}, Sacrifice another nonland permanent: Gluttonous Troll gets +2/+2 until end of turn.

Menace When God-Eternal Bontu enters the battlefield, sacrifice any number of other permanents, then draw that many cards. When God-Eternal Bontu dies or is put into exile from the battlefield, you may put it into its owner's library third from the top.

Flying When Nevermaker leaves the battlefield, put target nonland permanent on top of its owner's library. Evoke {3}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Deathtouch When Night Incarnate leaves the battlefield, all creatures get -3/-3 until end of turn. Evoke {3}{B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Flash When Offalsnout leaves the battlefield, exile target card from a graveyard. Evoke {B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Whenever a player casts a creature spell, that player sacrifices a permanent unless they pay {1}.

Enchant creature When Chime of Night is put into a graveyard from the battlefield, destroy target nonblack creature.

{3}{U}, Sacrifice a permanent: Return target permanent to its owner's hand.

When Hatching Plans is put into a graveyard from the battlefield, draw three cards.

Enchant creature Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Nylea. When you sacrifice Ordeal of Nylea, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Enchant creature Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Thassa. When you sacrifice Ordeal of Thassa, draw two cards.

Sacrifice Seal of Doom: Destroy target nonblack creature. It can't be regenerated.

Draw two cards, then sacrifice a permanent.