Horobi, Death's Wail (Serialized) [Multiverse Legends]Set: Multiverse Legends Type: Legendary Creature Spirit Rarity: Rare Cost: {2}{B}{B} Flying Whenever a creature becomes the target of a spell or ability, destroy that creature. Wherever it went, death came to Phyrexians and Kamigawans alike. Records of the Living Historians

Set: Double Masters Type: Creature — Kor Artificer Rarity: Rare Cost: {1}{W} When Stoneforge Mystic enters the battlefield

Each of those creatures gains persist until end of turn

Set: Friday Night Magic 2000 Type: Instant Rarity: Rare Cost: {R} Shock deals 2 damage to any target

Its controller creates a 3/3 colorless Golem artifact creature token

Set: New Phyrexia Type: Artifact Rarity: Rare Cost: {3}{W/P}{W/P} ({W/P} can be paid with either {W} or 2 life

Set: Starter 1999 Type: Sorcery Rarity: Rare Cost: {R}{R} Take an extra turn after this one

Set: Unfinity Type: Artifact — Equipment Rarity: Mythic Cost: {G} Whenever Killer Cosplay becomes attached to a creature

Set: Magic 2010 Type: Creature — Elemental Rarity: Rare Cost: {R}{R}{R} Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking

Set: Ikoria: Lair of Behemoths Prerelease Promos Type: Artifact Creature — Giant Rarity: Rare Cost: {3} At the beginning of combat on your turn

Set: Arabian Nights Type: Creature — Djinn Rarity: Rare Cost: {2}{B}{B} At the beginning of your upkeep

"If my hypothesis is correct

"Kill them all and feed them to the new recruits