Elemental Merphistophelin

Flying, Intense Heat, Extreme Dragonblight,
Extreme Waterblight, Extreme Iceblight,
Extreme Paralysis
{x}: Destroy x artifacts, this creature gains x
+1/+1 counters for the amount of mana used to
cast this ability
{x}{w}{u}{b}{r}{g}: Destroy 6 creatures, 6 lands and
deal x damage to target player