Maybe my previous comment was missed, but I figured it was boosting the initial hit when I posted it. It would be better against shield DR that way.
For balancing purposes it's essentially 3+1.5|5+2.5 ATK, which is a net increase of 3 ATK and 2 HP from unupped to upped, so it should cost 1 more upgraded (or be a 4|4 maybe). Relative to Wyrm, it's less effective with buffs and not useful with Sky Blitz, so it's definitely not as good for synergy.
It does work better as a passive since it is a chance effect. When you spend quanta to do something, I think there shouldn't be a chance that nothing happens (except maybe in
). However, I do think it needs something to set it further apart from Adrenaline and Dive. I would think a % chance to deal damage to a random enemy creature might work well, especially with the Guard theme. My 2
.