It's my birthday, can I get some trivia on Arcanis the Omnipotent, my first EDH general.

When we designed Arcanis, we wanted it to do something iconically Blue. I said, “How about Ancestral Recall?” We did think about Time Walk for about four seconds until we realized tapping to take an extra turn was obviously broken. Happy Birthday!

How come Arcanis the Omnipotent brings you more cards (representing knowledge), and Omniscience lets you cast spells for free (representing power)? Shouldn't they be Arcanis the Omniscient and Omnipotence?

The card was originally calked Omnipotence but that is the ultimate goal of black not blue so the name was changed.

How come Creative is mixing up Omnipotence and Omniscience? Now we have a card named Omniscience which lets you do everything for little to no effort, and we already Arcanis the Omnipotent who let you draw card, thus increasing your knowledge. Shouldn't they have been Omnipotence and Arcanis the Omniscient instead?

Arcanis should have been the Omniscient not the Omnipotent. Blue seeks knowledge, black seeks power. So blue wants Omniscience and black wants Omnipotence.