One of my gang is playing a Druid and wants to have an over-the-top pivotal scene where his emotional devastation allows him to shift into a huge dragon.
Without simply flooding his homeland with huge dragons to justify his shift beyond the humbler drakes, I am considering a custom move, maybe even charging some XP (maybe level+4) to activate it. How does everyone feel about using XP as currency to limit this glorious grandstanding? I want it to be big and amazing, but not every player, every session.
When a devastating life-event acts as a crucible for the advancement of your powers, you may exceed the restrictions of your class for one dramatic scene. A halfling could engage a much larger enemy, a cleric could receive a public audience with their deity, or a druid could shift into a huge dragon.
During this scene, your moves work as normal, only BIGGER.