Warden of the Fifth Tree

{g/u}: Warden of the Fifth Tree becomes a 2/2 Elf Warrior with Haste
{g/u}{g/u}{g/u}: If Warden of the Fifth Tree is a Warrior, it becomes a 4/4 Elf Warrior Wizard with Trample and Haste
{g/u}{g/u}{g/u}{g/u}{g/u}{g/u}{g/u}: If Warden of the Fifth Tree is a Wizard, it becomes a 8/8 with Trample and "Whenever this creature attacks, return target creature with lesser power to it's owners hand"