Mark of Lightning

Whenever a Lightning or Elemental attack you control is defended by a card from hand, you may destroy this. If you do, the attack deals 1 damage to the defending hero.

Rulings

From the Tales of Aria release notes

The effect is triggered during the defending window after the defending player has decided to defend with cards in hand, or during the reaction window when the defending player plays a defense reaction from hand.
The damage is not arcane and cannot be defended with cards in hand or by arcane barrier. It can be stopped by prevention effects that prevent any kind of damage.

TalentLightning

TypeEquipment

SubtypesArms

Defense0

SetsELE, LXI