9th Form: Flowing Wave Slash

You can't cast this spell unless you control a
creature with Water Breathing.
Tap target untapped creature you control with
Water Breathing, Destroy target creature, if
that creature is a demon exile it instead.
"I can do it. I know I can do it. I'm the guy who
gets it done, broken bones or not. No matter
what, I can do it! I can fight!" -Tanjiro Kamado