The silver streaker's warning came just in time to alert Vargas of the incoming attack. He jumped backwards and summoned his golem, causing the arm to hit his golem if anything as Vargas made some room. Deciding that staying on the possibly unstable structure was unwise Vargas made his way to another building and looked at the situation again. It looked like there were some more players nearby, one of them even looked like he had fire works but more importantly Mr. Silver was now attacking the monster's head, quite impressively really. 

Vargas shouted, "[color=red]Hell Bolt[/color]" hurled a flaming spear through the beastie's left arm, an ethereal crimson strand tying it to one of the buildings. Though the ability probably wouldn't be as effective on such a powerful monster it should at least stun the limb when the tether was broken and he would activate it again as soon as the creature attempted to use that limb to attack. After this he would need to back off and probably switch to a more helpful summon, his golem was meant for tanking but against something this powerful even it would be killed easily so a DPS focused summon would be more logical