With all cards in play, cast another creature.
Ivy Lande's Denizen's ability will trigger, put a +1/+1 counter on Scurry Oak
Scurry Oak's ability will trigger, creating a 1/1 token
Ogre Battledriver skill will give +2/+0 and haste to the token.
Ivy Lane's Denizen's ability will trigger again.
Repeat the process for infinite tokens.