Love the spells in general, but I feel like Antimat can do some horrifying things. The chain-to-other-enemies effect fires on every hit from the "primary" fire, which pierces. So if you have three enemies and a rock all lined up, those enemies are getting hit way more than five times.

The only spells I actually dislike are Odd/Even Meteor spells, and that's more just because of my own propensity for losing track of which rows people (like me or any hostages) are on; more attentive players should find them very useful.