The only realistic out is mourner drawn for turn, because no way they're holding it during your combo
The tip of his tail is actually white in this image, but that appears to just be a highlight
This is most beneficial on the Forest and Castle stages, which are timed rather than score based and have ledges
Special Summon 1 monster from your hand, Deck, or Extra Deck that has 2 or more of the same Type, Attribute, and/or ATK (but negate its effects), and if you do, negate that targeted monster's effects, also, after that, if these monsters have the same name, you can banish both, face-down
In the anime, his Deck includes the "Exodia" series, while in the manga, he uses a "Forbidden Beast" Deck