Ah well that makes senseNow that I think of it, are higher level spells harder to dispell with ani-magic?
Dispel Magic is in all four types of list, it does use the counterattack mechanics.
A critical success allows you to counteract a spell 3 levels higher, regular success is up to 1 level higher.
So basic dispel magic can counteract level 3 spells and up to level 5 spells (if you get a critical success).
Heightening Dispel Magic is essentially mandatory to keep up with higher-level spells.