"Find Safe" is an objective in the sidequest Safe and Sound in Borderlands 2
Walkthrough[edit]
Head into the Sanctuary Hole. Make your way forward until you find a pair of Bandits with a safe. They will drop it down into the Caustic Caverns. Kill them and then start on your way over to the far side of the Hole where you can find a safe route down to the lowest level of the hole and enter into the Caustic Caverns.
Once inside the Cavern head into the main area of the Cavern then start over to the right. Fight on through the Crystalisks to get to the far platform. Head inside and drop down onto the lower level. Head over to the left to find the safe ... on a massive Crystalisk: Blue. To retrieve the chest you must kill this Crystalisk.
Blue has all the normal attacks of a Crystalisk, plus it can make Mini Exploding Crystalisks to send after you. Still, the crystals on its feet are its weak point. Blast them away and Blue will go down without too much trouble.
