Guildpact

When Izzet Chronarch enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Whenever Dune-Brood Nephilim deals combat damage to a player, create a 1/1 colorless Sand creature token for each land you control.

Sacrifice three white creatures: Exile target creature. Whenever another black creature you control dies, create a 1/1 white Spirit creature token ...

({W/B} can be paid with either {W} or {B}.) Flying Whenever Mourning Thrull deals damage, you gain that much life.

{X}, {T}: Each creature with mana value X can't attack or block this turn.

({U/R} can be paid with either {U} or {R}.) {2}{U}: Copy target instant spell you control with mana value 2 or less. You may choose new targets for...

Haunt (When this creature dies, exile it haunting target creature.) When Orzhov Pontiff enters the battlefield or the creature it haunts dies, cho...

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

Whenever a player activates an ability that isn't a mana ability, Burning-Tree Shaman deals 1 damage to that player.

When Tin Street Hooligan enters the battlefield, if {G} was spent to cast it, destroy target artifact.

Defender (This creature can't attack.) As Order of the Stars enters the battlefield, choose a color. Order of the Stars has protection from the c...

Sacrifice three white creatures: Exile target creature. Whenever another black creature you control dies, create a 1/1 white Spirit creature token ...

Defender (This creature can't attack.) Whenever Souls of the Faultless is dealt combat damage, you gain that much life and attacking player loses ...

Flying Haunt (When this creature dies, exile it haunting target creature.) When Blind Hunter enters the battlefield or the creature it haunts dies,...

({U/R} can be paid with either {U} or {R}.) Flying Each instant and sorcery spell you cast has replicate. The replicate cost is equal to its mana c...

{W}, Sacrifice a creature: Target creature can't attack this turn.

{T}: Gelectrode deals 1 damage to any target. Whenever you cast an instant or sorcery spell, you may untap Gelectrode.

Flying When Sky Swallower enters the battlefield, target opponent gains control of all other permanents you control.

Flying Whenever you draw a card, Niv-Mizzet, the Firemind deals 1 damage to any target. {T}: Draw a card.

This spell can't be countered. Bloodthirst X (This creature enters the battlefield with X +1/+1 counters on it, where X is the damage dealt to you...

({R/G} can be paid with either {R} or {G}.) Sacrifice Wild Cantor: Add one mana of any color.

{R}: Gruul Nodorog gains menace until end of turn. (It can't be blocked except by two or more creatures.)

Flying When Skeletal Vampire enters the battlefield, create two 1/1 black Bat creature tokens with flying. {3}{B}{B}, Sacrifice a Bat: Create two 1...