Temporal Acceleration

Touch a willing creature. Until the spell ends, the target's speed is doubled, it gains a +4 bonus to AC, it has advantage on Dexterity saving throws, and it gains an additional action on each of its turns. That action can be used only to take the Attack, Dodge, Dash, Disengage, Hide, or Use an Object action.

When the spell ends, the target suffers the effects of the Slow spell for 3 turns as they readjust to the ordinary flow of time.