Even though there are multiple Tuners, there is only one Synchro Monster, Ukiyoe-P.U.N.K
Don't be that seller
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)
When thats paid, the rules text for adapt takes over: If this creature has no +1/+1 counters on it, put a +1/+1 counter on it. When the cost is paid and the ability resolves, theres a check if there are +1/+1 counters on the car d
Of the remaining 54 nonland cards, there are 25 total cuts that I would make to get the engine really revving, mostly considering efficiency or impact
The first 48 hours are when supply is tightest and FOMO is highest