The Spell Booster Charm for Invigorate removes the cooldown from additional previously cast spells when Invigorate is used. By default, only 1 spell cooldown is removed. This charm will remove the cooldown from 5 previously cast spells at its maximum level of 4.
I happened on a lucky trade with the Muzga. A crate full of mystical Charms! Those guys had no idea what they were sitting on.
Time will tell...
Spell Cooldowns Removed = 1 + level
Level Cost = level ^ 3
Artefact Levels Edit
|Artefact Level||Spell Cooldowns
|Cost (in Crystals)||Cumulative Cost|