Thunderclap Impulse

Choose a willing creature that you can see within range. Until the spell ends Lightning energy surges through the veins of the target, enhancing the speed of everything the target does, the target's speed is doubled, it gains a +2 bonus to AC, it has advantage on Dexterity saving throws, and allows the target to cast spells as a bonus action.

When the spell ends, the target can't move or take actions until after its next turn, as a wave of backlash sweeps over it.