I hope they bring back spells like Virulent Walking Bomb from the first games. That one would poison an enemy and make them explode when they died, and if any enemy nearby died to the explosion or within the next few seconds they’d explode too, and so on.

It wasn’t the best spell, but it fit the “mages are one misstep away from becoming eldritch abominations” narrative and damn did it make you feel powerful when the secondaries went off and it turned an entire room full of enemies into mist.