Mantle of the Ancients The ultimate recovery tool for late-game Voltron players
To preempt a possible answer, yes, there are decks that can draw a billion cards by turn two and take six Prizes (for example, using Electrode-GX to attach a bunch of Reversal Energy and Counter Energy to Alolan Raichu [Unified Minds] and discarding all these Energy to KO multiple Pokmon)
Theyre great, and while they are an Enchantment, they dont actually do anything for Enchantments
High Value Eternal Witness Riddlekeeper Dreamborn Muse Damia, Sage of Stone Avatar of Woe Minds Aglow Stitch Together Buried Alive Windfall Living Death Lightning Greaves Memory Erosion Grave Pact Okay, I questioned my intuition on what counted as a staple most here
Will it become a Steam Vents
It gives them all haste, and you can sacrifice it when you need the pump the most