Once he got thrown into a wild alien world teeming with horrors and death, and yet he survived with the help of wild magic that was linked to him, that he could barely control. This changed him into something one can barely call human, but still contains kindness and the spirit of comradery in his heart.
Now, he travels across the multiverse with a team of other adventurers to restore peace or whatever.
Here, he's portrayed in his new clothes from a desert planet he crash landed on.