Even if you end up flooded, you can still pump up any of your creatures to make them a decent threat
The Death Toll Commander deck gives you a strong black and green mill-based deck to pilot, letting you return cards from your graveyard back to play, though you can only do it once since that permanent comes back with a finality counter
That means a lot of popular deck archetypes, such as +1/+1 counters and artifact spam, eat particularly well
I put basically no stock in the pump ability, though I guess some prowess-heavy Veyran, Voice of Duality EDH decks or red aggro decks in Constructed might choose that mode on occasion
At the beginning of your upkeep, return target creature card from your graveyard to the battlefield
With Universes Beyond products coming through Standard you can expect they'll come through Arena via Through the Omenpaths or not