Any strategy that puts cards into your graveyard , whether that be mill, dredge, delve, discard, or even directly placing cards into your graveyard with the intent of playing them later, will benefit from having cards with flashback
Even if an opponent has removal to take care of the Idol, it will leave behind a similarly sizable token that also has trample unless it's exiled
Vraskas Fall Like Prologue to Phyresis, you get some marginal benefit from Vraska's Fall in EDH because your opponents will sacrifice their worst creature to this edict effect, but it'll also give them a poison counter to start proliferating
Being able to regain your creatures so easily and swiftly will always be a useful option in competitive Magic
[-2]: Destroy target creature