What are the Orblings you win in pvp for? Do they combine to make another monster? I was just wondering because you can continuously win them throughout pvp.

They combine into a kamiwyrm a super incredable 12 star? (Correct me if im wrong) dragon

^Yes. One of the most powerful in the game. Able to withstand many hits, and possesses one of the most powerful and annoying moves in the game.