Otrimi's Survival of the Fittest (EDH / Commander)

This is my first version of my Otrimi, the Ever-Playful deck. It contains every single card with mutate that can be played in these colors and the three creatures that care about mutate I wanted to include. The main game plan is to get Otrimi, the Ever-Playful out as soon as possible with mutate, meaning turn 3 or 4. That mutate pile should then grown over time. There are a few good targets to mutate him (or others) onto. A few of them have hexproof, make them a good alternative to Swiftfoot Boots. A few are unblockable or have other good utility abilities you can use to your advantage. Many of the creatures with mutate have some handy abilities that will ramp you, remove other things for you, draw your cards or other abilities. The bigger your pile, the more fun your next time mutating it will be. The deck also has quite a few ways to get cards back from your graveyard, the best being Phyrexian Reclamation.
Another aspect of this deck is, at least in my experience, that it has great politics potential. Your commander is a threat, but your board never looks too threatening. If someone else has 4 creatures with at least one having a good ability and you have Otrimi, the Ever-Playful with a few creatures beneath him, you are not seemingly not the one that will get the hate. It is a really fun deck to play.