Potion of Mana in Heroes 4

The mana of the hero who drinks this potion increases by 25 points. The spell point total can exceed the hero's normal maximum.

It can be used both on the Adventure Map and the Combat Map.

The mage Maranthea found a way to bottle the water from a Well of Magic, but unlike others who have tried she discovered a way to keep the water stable. To this day, she still hasn't revealed these special ingredients.