Thats because this two-mana artifact is begging people to sign it, giving the card a page counter on it for each person thats done so
Basically, it can attack right away, doesnt tap when it does, can only be blocked by two or more creatures, and if it does get blocked, excess damage hits the enemy player
To be clear, Im talking about running Obosh as the commander itself, not running it as a companion
Exclusive Magic: The Gathering x Avatar: The Last Airbender Card Reveals - Earth Allies Flameo
The Gatecrash Gideon just builds up loyalty and sometimes attacks as a large creature
New players might come to Magic: The Gathering because they can have pretty foil cards of their favorite video game character, but older players might get tired of seeing their beloved game diluted by other IPs (a common complaint about Universes Beyond)