Bestow Fate

Provided that the user has successfully cast it's sister spell; "Devour Fate", Bestow Fate may be used on any willing ally, including the caster themselves, to guarantee a critical dice roll for any attack, spellcast or ability check, which must be made on their next turn or within the next sixty seconds, though they must pass a DC15 wisdom saving throw or suffer 1d6+(casters spellcasting modifier) worth of psychic damage.