Apocalypse Maw

Apocalypse Maw can't attack or block unless you control six or more Sands.
Burrow {1}{g/w} ({1}{g/w}: Exile this creature and create a 0/1 colorless Sand creature token. Return it to the battlefield at the beginning of the next end step.)
Whenever Apocalypse Maw attacks, destroy all other creatures, then put a +1/+1 counter on Apocalypse Maw for each creature destroyed this way.