While your HP is above or equal to 75%, EX Special Attacks inflict 10% more Daze.
[Vortex] Arrow is a W-Engine in Zenless Zone Zero. One W-Engine can be equipped by each agent.
W-Engines increase the Base ATK of the agent by a certain amount, which is determined by the W-Engine's upgrade level.
[Vortex] Arrow has a secondary effect which increases an agent's HP.