oracle mtg card Treachery where X is your devotion to blue Thassa's Oracle is there to

Between the versatile creatures and the combat tricks, this deck has a ton of cool cards and mechanics to keep your opponents on their toes

It prevents your opponent from targeting their Lotus Field with Hidden Strings, Vizier of Tumbling Sands and Thespians Stage, which buys us some turns to try and assemble our combo

Fractured Identity is significantly better than Treachery or anything like that as it is so much safer

For formats like commander which have a buildaround card, people wanting to play that particular card is usually the driver and whatever colour(s) that card is will come second to what it does (typically)