You can kill with a single stroke.

Prerequisite(s): Deadly Stroke.

Benefit: When making a Deadly Stroke attack, you can expend one use of mythic power to instantly kill a non-mythic living creature. A Fortitude save (DC 10 + your base attack bonus + your tier) negates this effect, though the attack still deals double damage and Con bleed as Deadly Stroke. Constructs, oozes, and creatures immune to critical hits or precision-based damage can't be killed with this feat.