There's no kinetic energy in his form, he looks like he's been standing still in that pose. It makes the awkward looking slash a little weird; there's no force shown to be obliterating his opponent, no strength in the slashing arm. The design of the character is terrific, though. I really like the details of his armor. It's a shame these applibot art farms prefer awkward dramatic poses, I don't think your art needs it. But it's a fun Cryptid piece anyway and you definitely have compositional skills.