The Tetrabrachial Colossus

Trample, Haste
Impenetrable (Trample does not go through this creature.)
{r}{t}, regenerate this card.
{3}{t}, sacrafice The Tetrabrachial Colossus,
summon 3 10/10 Magma Golem creature tokens.
{6}{t}, deal X damage to your opponent. Where X
is the difference in your current life to your
starting life.