Cap on berserk damage

Is there a cap on black knight’s berserk damage?

It doesn’t seem to go more than Abt 110 - 130% increased damage
Even though it doesn’t say there is damage cap on the card description

Most likely yes, there would be.

There is also a cap on heroes like Athena & Kingston who have progressive special skills too (the enemy stat gets worse with each hit). Athena’s caps out at -64%; not sure on kingston but assume it would be similar/ the same.

Thanks!
I guess it doesn’t matter, by the time attack reaches 100%+, it would reach damage cap anyway