Just curious: How will it work with Skull Shield? 40%+12.5%? or the two calculations happen separately?
If flown, hmm, the chance to break happens when it attacks, whether flown or not, and poison also damages when attacking, so I'd say they occur separately.
Hmm...that would call for veeeery complicated calculations...I like the mechanic - it's just that the mathematics of balancing's a bit too complicated to me.
Apart from that, I like the card name too. I'm Japanese, and as far as I know, "kagerou" or "蜉蝣" refers to the adult form of an antlion. Kagerou only live for 18 hours, I heard...hence they're often used as metaphors for something short lived or untouchable.