Best Buddy
This upgrade will make it so clarence is more common to get (not too common though), as well as some positive benefits:
Invincibility; Clarence will be unkillable. It will be teleported out of the pit if unfortunate enough to fall into.
More stuff; Clarence will give relics (almost 1/10 of the time, rare relics), food, and orbs. It will also spawn these at a (not very) faster pace.
Transportation to NG+ or higher; Clarence will be able to come with you for NG+ and higher.
Holdable; Clarence can be picked up and held. Holding Clarence will make you regenerate every 40 seconds, increase evasion by 5%, increase primary and secondary weapon dmg by 2 until dropped.
let us embrace the clarence, just not to the point where we also get a hole through our cranium