Unsealed Spellbook

Swap one of your equipped Summoner Spells to a new, single use Summoner Spell. Each unique Summoner Spell you swap to permanently decreases your swap cooldown by 25s (initial swap cooldown is @f3@ seconds). Your first swap becomes available at 6 mins. Summoner Spells can only be swapped while out of combat. After using a swapped Summoner Spell you must swap 3 more times before the first can be selected again. Smite damage increases after two Summoner Spell swaps.

Tree

Inspiration

Row

Keystone

In short

Swap Summoner Spells while out of combat. Swapping to unique Summoner Spells will increase the rate at which you can make future swaps.

Patch

16.16.1