Triple Accel

Choose a willing creature that you can see within range. Until the spell ends, the target's speed is tripled, it gains a +4 bonus to AC, it has advantage and +2 on Dexterity saving throws, and it gains an additional 2 actions on each of its turns. That action can be used only to take the Attack (one weapon attack only), Dash, Disengage, Hide, or Use an Object action.

When the spell ends, the target can't move or take actions until after its next two turns, as the  body recovers from the stress of further speed enhancement.
This spell can only affect one creature at a time.