Omega Is Very Powerful In Magic: The Gathering The Stunning Superboss Has Arrived Omegas ability to stun enemy cards is a great one in the Commander format, which traditionally involves multiple players
Izzet is often the color of spells, with many powerful low-mana instants and sorceries that can be cast as soon as the game starts
I do like the effect too, where the Primordial Ooze mindlessly attacks, mindlessly grows, and you have to keep pumping mana into it (more mana as it grows, too!) otherwise it'll turn around and attack you
Fetches are legal in Commander, they are not banned and don't even scratch the Game Changer list
Whisperwood Elemental gives resiliency against sweepers like Languish and Planar Outburst and makes manifests that live through the minus of Ugin, the Spirit Dragon
When this creature dies, if it had a revival counter on it, return it to the battlefield with one fewer revival counter on it at the beginning of the next end step