Potion of Magic Blocking

Potion of Magic Blocking blocks all level 5 spells for 5 rounds and removes all current lvl 5 spell effects and lower of the consumer. It's sold at Sorcerous Sundries.

In-game description
"This powerful exilir imbues the drinker with immunity to all spells and including 5ht level and lower spell effects are removed from the embiber. The effect will only last for five rounds however, so careful timing necessary."