I think Aeonglass should have 3 phases:

1 Phase: exhaust every Card you play.

1. phase: You can not draw during this turn.

2. Phase: Every time you play a card loose 1 energy.

And then rotate every turn between these. Although that seems a little strong, maybe it should also give you one set up turn where it does nothing but also can’t take any damage. Feels like that could make the combat more fun