They were 0/1 colorless creature tokens with the ability "Sacrifice this creature: Add ." Rise of the Eldrazi was all about getting giant Eldrazi creatures onto the battlefield, so the set needed help with mana
Brawl and appears prominently in the Pokmon anime series
But yeah, Doctor #4 has a once-per-turn effect that lets you play historic cards (that's to say, legendary cards, artifacts, and sagas) from the top
2023-06-16 Amass Zombies works the same way, except you create a 0/0 black Zombie Army creature token if you don't control an Army
Each player can have only a single stage card in effect at one time
Legendary Creature - Warrior Squirrel Color tag templates(None) Chrome Host Seedshark Flying Whenever you cast a noncreature spell, incubate X, where X is that spell's mana value