Trying something with blessing the opponent's creatures and I come across the Light/Air AI3. When I bless the Wyrm its current stats change accordingly, but the max stats stay the same. When the Wyrm attacks next turn it loses the extra HP, and loses the extra attack after using its dive ability.
EDIT 1: Also tried this with the Pegasus and got the same thing.
EDIT 2: I also got this with other creatures.