The Mirrorblade

Weapon equipment — Legendary

Your Replicator's Gambits instead have, "Put up to six target troops you control into your deck. Those troops get "Deploy - Create six replicas of this and put them into play.""

Changes: Replicator's Gambit
Slot: Weapon
Rarity: Legendary
Set: Shards of Fate
How obtained: Frost Ring Arena

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