Kozilek's Command [Modern Horizons 3 Prerelease Promos] Play Booster Display I call this nest-stuffing

I call this nest-stuffing

Set: Bloomburrow Special Guests Type: Creature — Rat Rarity: Mythic Cost: {1}{B}{B} Relentless Rats gets +1/+1 for each other creature on the battlefield named Relentless Rats

but I didn't expect it from the building itself

As the great scourge passed by

Whenever an opponent attacks another one of your opponents

Kozilek's Command [Modern Horizons 3 Prerelease Promos] Play Booster Display I call this nest-stuffingSet: Modern Horizons 3 Prerelease Promos Type: Instant Eldrazi Rarity: Rare Cost: {X}{C}{C} Choose two Target player creates X 0 1 colorless Eldrazi Spawn creature tokens with "Sacrifice this creature: Add C." Target player scries X, then draws a card. Exile target creature with mana value X or less. Exile up to X target cards from graveyards.