Oliphaunt

Trample
Oliphaunt's rider gets +8/+11 and has trample.
Mount {5}{g}{g} (you may pay {5}{g}{g} to attach this creature to another target creature you control.
Oliphaunt can't attack or block as long as it's
attached to a creature. Mount only as a sorcery.)
Grey as a mouse, / Big as a house, / Nose like a
snake, / I make the earth shake.