Demonic Haste

Choose a willing creature that you can see within range. Until the spell ends, the target's speed is doubled, it gains a +2 bonus to AC, it has an 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 (one weapon attack only), Dash, Disengage, Hide, or Use an Object action. WARNING IF YOU USE THE SPELL FOR MORE THAN 4 TURNS OR IF YOU ARE NOT IN COMBAT YOU GET THE SPEED FOR 20 MINUTES, IF YOU EXPEND THE TIME LIMIT YOU TAKE 2D6 NECROTIC AND 1D4 OF PSYCHIC DAMAGE.

When the spell ends, the target can't move or take action until after its next 2 turns, as a wave of lethargy sweeps over the being.