A rare ability could have a rare danger - magical traps (BARELY visible on the floor) that yank anyone flying/levitating downward for huge impact damage. Bonus points for an active high-level beartrap and something acidic on said space!
Some kind of trap for levitating/flying animals would be good. I agree it would also be useful to set said trap for magpies
Maybe we could just limit the maximum power so that nothing is more powerful than the holy hand grenade, but then you could still have fun turning random objects into bombs.