Panharmonicon [The List] Dinosaur Cat Nightmare A deck can have any

A deck can have any number of cards named Rat Colony

Set: Mystery Booster Type: Artifact Rarity: Uncommon Cost: {2} {1}

Set: Guilds of Ravnica Prerelease Promos Type: Creature — Elemental Rarity: Rare Cost: {1}{R} Whenever you cast a red spell

Set: Secret Lair Drop Series Type: Creature — Elemental Rarity: Rare Cost: {3}{U}{U}{U} Flying

you may sacrifice two Islands

Panharmonicon [The List] Dinosaur Cat Nightmare A deck can have anySet: The List Type: Artifact Rarity: Rare Cost: {4} If an artifact or creature entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. All who listen hear their own song, a unique melody played just for them.