Tundrus's Crystal Shatterer

WARNING: INSANELY RISKY

Part 1: Gather the power of Tundrus, the Blizzard God. Roll a d20. You need to get a natural 20 If you don't, he is disappointed, and hits you with 2d6 cold damage. Although if you DO succeed you activate this godlike spell. 

If Succeed: Dash up to your opponent and freeze them in absolute zero. Then put all of Tundrus's power into your fist and shatter the opponent into a million pieces, instant killing them. You cannot kill the opponent that is gargantuan size with this spell. If you get lucky and get a natural d20 and they are gargantuan size, you will be hit with 1d12 bludgeoning by the opponent.