One of the best checks for spellcasters in any system, except maybe 4E, is other spellcasters. Enemy spellcasters see buff stacks all the time, they have spellcraft, know to watch for it, and will always attempt Dispel Magic on them.
The PC spellcasters will start adopting other non-buff strategies when they start losing whole stacks of buffs to Dispel Magic. You'll still get an enlarged dwarf from time to time, but not nearly so much.
If Dispel Magic sucks in your edition, boost it. That should be the spell that does what you need.
The PC spellcasters will start adopting other non-buff strategies when they start losing whole stacks of buffs to Dispel Magic. You'll still get an enlarged dwarf from time to time, but not nearly so much.
If Dispel Magic sucks in your edition, boost it. That should be the spell that does what you need.