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)
Pro Tip: Build relationships with store staff and fellow players
Selvala, Heart of the Wilds The most important resources in Magic are mana and cards, so any card that gives you an advantage in both regards becomes quite strong
Her boat, The Omenkeel, is said to be able to carry travelers between the ten realms of Kaldheim
3 Trophy variant sold for $192,000 in a recent PWCC auction as a testament to their expense
Depending on the type, each set will normally have its own theme, either based around a particular fictional setting in the lore, or perhaps tailored to one particular mode of play, like the Commander or Modern formats