Aldra's Unleash Maximum Potential

You draw out the inner latent power of one creature within range. Making them as powerful as they can possibly be. While under the effects of this spell, a creature's AC becomes 20 if it is not 20 or higher already. When the creature takes the attack action, they can make one additional attack as part of that action. A creature also has advantage on attack rolls and whenever they deal damage from an attack, spell or ability, they maximize the damage dice. Furthermore, the creature has advantage on all saving throws and if the creature succeeds on a saving throw, they take no damage from the effect their saving against. When the spell ends, the creature falls unconscious for 1 minute.