One of my favorite ideas, though, is creatures that self-bounce like glitterfang. You can keep re-triggering the mutation abilities that way, since both the creature and the mutation will return to your hand.
In a similar vein, sticking them underneath manlands means you can keep them safe from sorcery-speed removal.
Two Score, Minus Two or: A Stargate Tail
(Image by totallynotabrony)