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Long shot but Nox?
Working on cleaning up List Of Shows That Need SummaryA newer game that meets the other requirements is Magicka.
Edited by droidOne of the Heroes of Might & Magic games?
Age of Wonders 2 is over 15 years old now, and has a couple spells that damage all units on the field, including allies. Could also be the original Age of Wonders, but I never played that one much.
I would say Wizard 101, but I don’t think it’s that old
I played a game with my brother 15-20 years ago, and all I remember is my character was a wizard or mage, and I used a spell that rained rocks down all over the screen. It damaged my brother's character (even though we were allies) and made him mad. The game was a older, isometric-viewed game. I think it possibly had zombies as enemies, chests you can open, and I think a farm level with a bunch of tail grass or wheat. It's been so long I'm not sure on any of these details.