Ikoria: Lair of Behemoths

Chittering Harvester | Creature | Nightmare | Mutate {4}{B} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Whenever this creature mutates, each opponent sacrifices a creature. | Grzegorz Rutkowski

Duskfang Mentor | Creature | Human Cleric | When Duskfang Mentor enters the battlefield, put a lifelink counter on target non-Human creature you control. {1}{B}, {T}: Put a +1/+1 counter on each creature you control with lifelink. | Livia Prima

Grimdancer | Creature | Nightmare | Grimdancer enters the battlefield with your choice of two different counters on it from among menace, deathtouch, and lifelink. | Randy Vargas

Insatiable Hemophage | Creature | Nightmare | Mutate {2}{B} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Deathtouch Whenever this creature mutates, each opponent loses X life and you gain X life, where X is the number of times this creature has mutated. | Antonio José Manzanedo

Void Beckoner | Creature | Nightmare Horror | Deathtouch Cycling {2}{B} ({2}{B}, Discard this card: Draw a card.) When you cycle Void Beckoner, put a deathtouch counter on target creature you control. | Daarken

Zagoth Mamba | Creature | Nightmare Snake | Whenever this creature mutates, target creature an opponent controls gets -2/-2 until end of turn. | Yeong-Hao Han

General's Enforcer | Creature | Human Soldier | Legendary Humans you control have indestructible. {2}{W}{B}: Exile target card from a graveyard. If it was a creature card, create a 1/1 white Human Soldier creature token. | Wisnu Tan

Necropanther | Creature | Cat Nightmare | Mutate {2}{W/B}{W/B} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Whenever this creature mutates, return target creature card with mana value 3 or less from your graveyard to the battlefield. | Jason A. Engle

Cunning Nightbonder | Creature | Human Rogue | Flash Spells with flash you cast cost {1} less to cast and can't be countered. | Ekaterina Burmak

Sonorous Howlbonder | Creature | Human Warrior | Menace Each creature you control with menace can't be blocked except by three or more creatures. | Kimonas Theodossiou

Boneyard Lurker | Creature | Nightmare Beast | Mutate {2}{B/G}{B/G} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Whenever this creature mutates, return target permanent card from your graveyard to your hand. | Nils Hamm

Skull Prophet | Creature | Human Druid | {T}: Add {B} or {G}. {T}: Mill two cards. | Nils Hamm