The Call of Liberty is a limited premium Card Pack avaliable from July 4, 2014 dedicated to American Independence Day. Features two new PWR 19 Cards. And rereleases three URs as "Reborn URs", powered-up animated versions of popular Cards. From the 5th draw have a continuous 5x Drop Rate on all URs. Battle Elixirs come as draw bonus for Heroes Colosseo XIII.
Plus holding an Independence Day 72 hours Gem Sale.