If you have reason to change only specific Creatures, however, this could be a powerful effect
Although Pokmons satisfying loop of sending out Pokmon, evolving them and executing their most powerful moves has remained basically the same, later sets have introduced awesome additions like tag teams, which include two Pokmon on a single card so you can see how Pikachu and Zarude would fare against Eevee and Corviknight
Enrage Whenever this creature is dealt damage, it fights up to one target creature you don't control
For you get a flying 2/1 creature that can be flashed in
This is most useful in coven decks to mash up two underpowered mechanics
Not only can these spells be cast on the same turn cycle that you jam Katara, but they also help protect her from any removal spells your opponent has at the ready