Here are the ideas I had so far
- a frog transformation, as an attack, that could target any monster or wizard in LOS. A "frogged" target could not attack by any means, but still plays spells as long as it is no "red" ones
- a counterspell that would deflect the spell instead of canceling it. For example with a fire ball, the spell would make a 90° or 180°, even finishing into a wall a making cracks
- a transformation (A djinn ?) that couldn't do physical attacks but could spend any card as a 3 energy card.
- a mimic, a counter that could be played when a wizard or a creature takes a chest. The chest is now a creature and cannot be taken before being KOed.
- Reinforce a spell by putting a number of duration token on the target maintained by equal to this spell's energy.