Just won a match very cheaply. And im 100% it was due to a bug.
I was Illucia , i picked the same hero power everyone picks. (1 dmg to hero for every spell i cast)
It was against warrior who shuffled the 15 spells into his deck.
I discovered them, picked Aimed Shot and played it
I fully expected for the very next hero power to do 3 dmg once. Unfortunately, the bug was my hero power proceeded to do 3 dmg for the rest of the game
I.e. my next turn i cast 5 spells and did 15 damage with my hero power for a concede