Its a nifty little spell that is incredibly good because it doesnt just target creatures, which makes it incredibly versatile as you can use it to protect a land from a timely Wasteland if needed, especially if you can keep returning the Safekeeping from your graveyard by using cards like Eternal Witness
Flamewake Phoenix 3.5/10 A 2/2 flying haste for 3 is ok, it has some immediate action and applies some reasonable pressure, particularly to planeswalkers
This makes Ancient Adamantoise the first MTG card to mention it right out of the gate
The rest of us poor folks will settle for our Gnawing Vermin instead, though
He still sees some Commander play today
Like infect, mill is loathed by many players, even though its really just as viable of a strategy as any other and often backfires (most decks benefit from having more cards in their graveyard)