Amethisian Temporal Disruption

You harness the ancient temporal energies of the Amethyst Isle to create a powerful time-warping field within a 30-foot radius centered on a point you choose within range. In this area, time flows irregularly, allowing you to either accelerate or decelerate its effects on creatures within it. Choose one of the following effects when you cast the spell:

• Accelerate Time: Allies within the area gain an extra action on each of their turns, which can be used to take the Attack (one weapon attack only), Dash, Disengage, or Use an Object action. Their movement speed also doubles, and they have advantage on Dexterity saving throws while in this area.

• Decelerate Time: Enemies within the area must make a Wisdom saving throw at the start of each of their turns. On a failed save, they lose their action and their movement speed is halved as they struggle against the effects of temporal disruption. While within the field, affected creatures also have disadvantage on Dexterity saving throws.

Cost: You sacrifice 15 HP upon casting to initiate the temporal disruption. Additionally, maintaining concentration on this spell requires 10 HP per round as you channel the ancient Amethisian energies.