While rewards can be earned simply for being victorious in these showdowns, additional items can be received when completing the unique mission tasks featured for each battle
You can self-mill with Thawbringer and hope to reanimate Perigee Beckoner with Seedship Broodtender, but outside of these niche interactions, the synergy just isnt there
Moreover, since this monster has great resistance and only forces destruction in battle, the opponent has no option to break through Osiris with a true attack
The card allows the player to instantly destroy a monster once it is summoned to the field, which is certainly a useful effect
...especially given that we're in a universe where people love to duel on motorcycles for some reason I can only classify under "God knows what"
This changes everything about your turn and again potentially means you win in a single turn all because you could draw two cards