Its the first of three Universes Beyond crossover sets launching in 2025, with Spider-Man and a third, unrevealed set coming later in the year
It plays a somewhat different game of Magic than other types of decks do, and can be a fun deck to play if youre looking to get some mileage out of big, powerful cards but arent sure how to cast or utilize them to great effect
You can still play instants and creature abilities on your opponent's turn
While it's a fine card and scales throughout the game, there are a ton of graveyard-centric / reanimation decks in Commander, and it seems unlikely that Gyrus, Waker of Corpses will beat out most of the pre-existing options outside of something like Jund Hydra tribal (and then, it's not even that good with many Hydras since they are X-creatures, which won't work with the reanimation ability)
Certain decks, such as landfall decks or mana ramp decks, benefit from having a higher mana average since they will be able to afford beefier spells fairly early in the game