Ezekiel is an Warrior hero, with the following Leader trait:

Ezekiel preemptively strikes the enemy before an incoming attack, dealing X% of total damage. Activates once per turn.

As a leader, each member of your team gains this bonus.

Notes:
• This is a separate attack from Overwatch or Retaliate, so the order of attacks is: Overwatch, Regal Authority, Retaliate
• If Regal Authority pushes a target, then the enemy attack will not happen at all, and neither will the survivor's retaliate attack
• The Interruptor trait applies to the Regal Authority attack, so when Ezekiel with Interruptor hits the enemy before their attack, it will cancel that attack
• Ranged survivors, or survivors with long-range melee weapons can preemptively attack against ranged enemy attacks as well.