Yoshi

Ride - Saddle 3. When Yoshi Attacks while saddled, creatures blocking Yosh become 0/1 eggs with no abilities until end of turn and Yoshi gains +x/+x equal to the saddling creature's power and toughness until end of turn.
Egg lay - {g/u}, {t}: Target creature an opponent controls loses all abilities and becomes a 0/1 Egg until end of turn.
As Yoshi attacks, you may Egg roll: Yoshi loses saddle and gains +3/-2 and trample until end of turn.
(Saddle as a sorcery)