Sans the Skeloton

This creature has 18 stamina counters (When this creature is destroyed, instead sacrifice a karma counter, it phases out)
When this creature deals combat damage to something, put a karma counter on it, if it has karma it takes additional damage to amount of karma, when damage ends, double the karma.
{x}{u}{u}{t}: Summon X gasterblasters, they must attack this turn, after damage step, destroy them