Willbur, Rat Transmogrifier

Elephants can't attack of block.
At the beggining of each player's end step you gain
3 life for each elephant they control.
{1}{w}{u}: Target creature loses all abilities and becomes a 3/3 white elephant until end of turn.
"A 3/3 with no abilities that can't attack or block is irrelephant."
—LSV