Quote Originally Posted by TripleHBK
Because the "readied" hero can only attack and not use his ability, I guess.
True, although this would only really be relevant in the cases of Boris and Ter Adun though, as they are they only ones who either can, or would need to use their ability twice in a turn. Amber can't because her weapon can't gain a second bonus (although if her first weapon broke and she played another this would prevent her from buffing the new one right away), while Logan's ability lasts till the end of the turn regardless, so he doesn't have to activate it again to use it.