"Doubles the chance of uncovering Lucky Clovers in crates or with kills. Increases speed by 4. Discovered in the Gambler's Dice during the Holiday Event in 2015."
It gives you double chance of finding a lucky clover and also gives 4+ walkspeed to the user. This Infuser was awarded to players that bought the Gambler's Dice pass on Black Friday 2015, and then used the code "open:artifacts" (without quotations).