Whenever you cast an instant or sorcery spell, create an X/X colorless Construct artifact creature token, where X is that spell's converted mana cost. 3UU, Exile Metallurgic Summonings: Return all instant and sorcery cards from your graveyard to your hand. Activate this ability only if you control six or more artifacts.
All artifacts have “At the beginning of your upkeep, sacrifice this artifact unless you pay 1.”
Each player loses X life, discards X cards, sacrifices X creatures of their choice, then sacrifices X lands of their choice.
{T}, Sacrifice two other creatures: Any number of target players each lose 2 life and sacrifice a creature of their choice. You add {B}{B} and draw a card.
Return to the battlefield all permanent cards in your graveyard that were put there from the battlefield this turn.
At the beginning of your end step, if you control no creatures with decayed, create a 2/2 black Zombie creature token with decayed. (It can’t block. When it attacks, sacrifice it at end of combat.)
Whenever Ayara, First of Locthwain or another black creature you control enters, each opponent loses 1 life and you gain 1 life. {T}, Sacrifice another black creature: Draw a card.
All artifacts have “At the beginning of your upkeep, sacrifice this artifact unless you pay {1}.”
Hagra Mauling Instant This spell costs {1} less to cast if an opponent controls no basic lands. Destroy target creature. Hagra Broodpit Land Hagra Broodpit enters tapped. {T}: Add {B}.
At the beginning of your upkeep, you gain 2 life for each Shrine you control.
As Sanctum Prelate enters the battlefield, choose a number. Noncreature spells with mana value equal to the chosen number can't be cast.
As Pithing Needle enters the battlefield, name a card. Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.
Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "T, Sacrifice this artifact: Add one mana of any color.")
T: Add 1 to your mana pool. T, Sacrifice Ghost Quarter: Destroy target land. Its controller may search his or her library for a basic land card, put it onto the battlefield, then shuffle his or her library.