Using the illusion of himself, he "arrived" on Earth in a energy ball, attracting Yuma's attention by nearly mowing him and his friends down and destroying several buildings
Once back in the United States, he had heard of Dungeons & Dragons but neither his local game store nor his friends had a copy, so he developed his own version of what he thought the game would be based on the descriptions he had read, which he considered closer to Clue , with players moving from room to room fighting monsters with a fixed end-goal
If it battles another Monster, it can banish both itself and its opponent then come back once its player finishes their turn
Once per turn, during your Main Phase: You can return this face-up card to the hand
A concession causes you to leave the game, which then causes you to lose the game (Once you concede, you no longer control a Platinum Angel, so its ability cant prevent you from losing the game)
That up-front Adventure is just a bonus -- the real reward is outlasting the opponent with reanimation that draws from either graveyard, which is even better in "aristocrats" builds.