I love thinking of spell ideas. Feel free to share your ideas too if you have some. These are 2 ones that I have been thinking about since a very long time and they are my favourites.
1) Full Moon 0 pips Target polymorphs into a random form for 1 round. Description: You choose any player in a fight and they transform into 1 random form that they already have unlocked. This could allow for diversity. How to get: it could be a RARE Treasure Card you find from the Beastmoon chests. It would be rare to prevent it from being overused and make it feel special.
2) Karma 2 pips Afterlife: Target reflects last damage used to the caster. Description: The idea is to prevent first turn big hits to wipe out a small form. By casting this spell on what you think will be the first target, you protect them from a giant one shot in the first turn of a 2v2 fight for example. The killing hit will be reflected back to it's caster, so that means if it was a 200 or higher, it would be a lot. And if it's 25 then it would be almost nothing for 2 pips. This could be a great spell for forms such as the Death Draconian which are unable to do much to defend themselves or their friends in the first turn.
I also made card art for these. I'm aware these effects could be difficult to program and perhaps potentially imbalanced. However, it's been a long time since I've thought of these ideas and they keep coming back to me. These types of ideas could make Beastmoon feel less repetitive. I love the event and I do find it fun as it is now! Thank you for reading.