I said "RIBBIT!!"

(You may cast a Legendary Commander instant only
if you control your Commander)
Create a 1/1 blue Shapeshifter with Changeling.
It has when this creature comes into play you may
pay {p/u}, target commander becomes a 1/1
green frog & loses all abilities until end of turn.
Commander amplify (When this spell is cast you
may pay X life. X equals the number of commanders
on the battlefeild, if you do, copy it X times.)