Aqua Mask

Head equipment — Common

Your Lightning Elementals instead have, "When this deals combat damage to an opposing champion, choose one at random: Gain a charge; or gain two charges."

Changes: Lightning Elemental
Slot: Head
Rarity: Common
Set: Frost Ring Arena
How obtained: Set 1 Wheels of Fate

What it does is the game's own text; how it was obtained is from the owner's records.