Thrun, Crippler of Magic

+1: Regenerate Thrun, Crippler of Magic, then Thrun becomes a 4/4 green creature with the subtype troll until the end of your turn.
-1: Thrun, Crippler of Magic gains hexproof until your upkeep after next.
-7: Your opponents can't cast non-creature spells. Thrun cannot be countered.