Monster Stampede is a black-based strategy most effective in the late game. It requires you to have many allies in your graveyard, as well as a Monster Mage in play. Simply use 6 energy ( 3 black and 3 normal) each turn to spawn a frightening Monster Ally from one of your dead allies! Be careful not to run out of allies-- if you do, use Cemetery Gate to populate your graveyard again. The more Monsters you play, the stronger you are; just watch out for Killer Wave!
-Monster Mage (without this, you can't resurrect a single Monster Ally)
Strong against: Quality decks with heavy-stat allies (at 5AP, Monster Allies can instantly kill almost any ally)