Rakdos Signet [Duskmourn: House of Horror Commander] Dominaria United Promos Whenever an opponent gains control

Whenever an opponent gains control of a permanent you control

Set: Secret Lair Showdown Type: Creature — Rat Rarity: Rare Cost: {1}{B}{B} Relentless Rats gets +1/+1 for each other creature on the battlefield named Relentless Rats

The Envoy steeled herself

Set: The Brothers' War Type: Sorcery Rarity: Mythic Cost: {X}{G}{G} Create X 1/1 green Forest Dryad land creature tokens

this scheme deals 6 damage to that player

Rakdos Signet [Duskmourn: House of Horror Commander] Dominaria United Promos Whenever an opponent gains controlSet: Duskmourn: House of Horror Commander Type: Artifact Rarity: Uncommon Cost: {2} {1}, {T}: Add {B}{R}. Made of bone and boiled in blood, a Rakdos signet is not considered finished until it has been used as a murder weapon.