4 Scavenging Ooze Ooze That Just Keeps Growing 2 Mana Cost in Green Creature Scavenging Ooze is an infuriating creature to fight, going from a simple 2/2 upon its entrance to suddenly being a massive threat as long as its controller has mana and anyone in the game has a graveyard full of creatures
In other words, we get 3-4 mana worth of value each time we cast a noncreature spell large enough to draw two cards (not to mention Hero tokens)
Teenage Mutant Ninja Turtles (Play Booster)
As you mutate creatures on top of one another, you will generate a ton of value by creating creature tokens, summoning creatures for free, tapping down your opponent's creatures, fetching lands, bouncing opposing creatures, etc
He can be shifted for four, making him cheaper to play, and he lets you play a song card of cost four or less for free whenever he quests