Archon's Forge
From Destinypedia, the Destiny wiki
Archon's Forge is an Arena that can be initiated as a Public Event in the Plaguelands. In order for an event to start, Guardians must present SIVA Offerings. Once the event has started, players will engage in a five-minute long brawl with Splicers, which must be killed in time for a boss to appear at the end of the round. There is a boss for each Splicer type.