Guildpact

Bloodthirst 3 (If an opponent was dealt damage this turn, this creature enters the battlefield with three +1/+1 counters on it.) Flying {R}{R}{R}: ...

{3}{B}, {T}: Target creature gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.) {1}{B}: Regener...

Trample Whenever Borborygmos deals combat damage to a player, put a +1/+1 counter on each creature you control.

Whenever Bioplasm attacks, exile the top card of your library. If it's a creature card, Bioplasm gets +X/+Y until end of turn, where X is the exile...

When Ogre Savant enters the battlefield, if {U} was spent to cast it, return target creature to its owner's hand.

{T}: Target creature gets +1/+1 until end of turn.

Flying When Shrieking Grotesque enters the battlefield, if {B} was spent to cast it, target player discards a card.

When Gruul Scrapper enters the battlefield, if {R} was spent to cast it, it gains haste until end of turn.

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters the battlefield with a +1/+1 counter on it.) {2}{R}: Target creature...

When Crystal Seer enters the battlefield, look at the top four cards of your library, then put them back in any order. {4}{U}: Return Crystal Seer ...

Whenever Glint-Eye Nephilim deals combat damage to a player, draw that many cards. {1}, Discard a card: Glint-Eye Nephilim gets +1/+1 until end of ...

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 your...

({U/R} can be paid with either {U} or {R}.) When Petrahydrox becomes the target of a spell or ability, return Petrahydrox to its owner's hand.

Skyrider Trainee has flying as long as it's enchanted.

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters the battlefield with a +1/+1 counter on it.) {R}, {T}: Attacking cre...

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters the battlefield with a +1/+1 counter on it.) Sacrifice Gristleback: ...

When Revenant Patriarch enters the battlefield, if {W} was spent to cast it, target player skips their next combat phase. Revenant Patriarch can't ...

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

{B}, Sacrifice a creature: Target creature gets -1/-1 until end of turn.

({R/G} can be paid with either {R} or {G}.) {3}{R}, Sacrifice a land: Gruul Guildmage deals 2 damage to target player or planeswalker. {3}{G}: Targ...

Haunt (When this creature dies, exile it haunting target creature.) When Exhumer Thrull enters the battlefield or the creature it haunts dies, retu...

Flying Daggerclaw Imp can't block.

Flying Haunt (When this creature dies, exile it haunting target creature.) When Graven Dominator enters the battlefield or the creature it haunts d...

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters the battlefield with a +1/+1 counter on it.)