He can also work as a commander in a mono white deck, but is a great support creature for a Selesnya cat deck as well
It might get interesting in Temur control as well, where it could support a strategy of ramping into threats while keeping the board under control
Clearly if youre playing this, you want to transform it into Bahamut, Warden of Light
Now, you can choose between a ton of different options, and some people are going to prefer Unhinged, Unglued , or even Zendikar basics over Unstable , which will likely keep the price from going too high
Don't sleep on that mill trigger, either
By using creatures to tap for mana, trigger draws and generate bonus tokens (also elves), the elfball can multiply in size at dizzying speeds