Unique - Stasis:
Put yourself in stasis for 2.5 seconds, rendering you untargetable and invulnerable for the duration but also unable to move, declare basic attacks, cast abilities, use summoner spells, or activate items (20 second cooldown).
Unique - Magical Opus:
Increase your ability power by 50%.
Wooglet's Witchcap by itself grants 450 ability power due to the increase from Magical Opus.