Subgrid Zarak is located in the vicinity of the Ark. Shortly after the creation of Dinobot 2, Depth Charge was exiting the Maximal base in the Ark 's volcano when his on-board computer alerted him to the presence of Rampage's spark "nearby" in Subgrid Zarak. Depth Charge then went in search of his quarry, unaware that what had been detected was the half of the Protoform X spark now residing within the Transmetal 2 clone. Feral Scream Part 1