Arcane Compendium entry[]
You can put more power into your buffs. Each modifier added increases the level of the buff applied. This will not affect duration.
Buff power is a modifier silver skill that increases the power of a spell. It is under the Defense tree. You can stack a maximum of 3 buff power modifiers in a spell.
Unlocking[]
To unlock the skill you have to make a spell containing:
Any shape + Leap + Slowfall + Haste + Gravity well + Swift swim