Thought Enhancer

Trinket equipment — Legendary

Your Mind Games have, "When an opposing champion plays a Standard resource, if this is in your hand, gain the thresholds that resource can provide."

Changes: Mind Games
Slot: Trinket
Rarity: Legendary
Set: Frost Ring Arena
How obtained: Frost Ring Arena

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