Grip is fought during the Heroes' Quest. He has the key you need to open the chest with the candlesticks during the thieves' armband section. He lives in Brimhaven and is found at ScarFace Pete's Mansion.
In order to get his key ring you, or your partner, must kill him. A player who began the quest within the Phoenix Gang will need to kill him using ranging or maging equipment from a window on the opposite side of his yard.
Once dead, he drops a key for use in said quest, which a player who began the quest within the Black Arm Gang must retrieve.
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