Sylas' Temporal Guidance

The timelines open before you revealing myriad futures. Your allies greatest strength and your enemies greatest folly is made manifest.

Allies: All allies within the radius when the spell is cast gain a Natural 20 that can be used for a single attack roll, ability check, or saving throw within the duration.

Enemies: All enemies within the radius when the spell is cast must make an Intelligence saving throw or be afflicted by a Natural 1 that will replace their next attack roll, ability check, or saving throw.

An ally affected by the spell must declare they are using their Natural 20 before a roll is made.