Let's unpack this with an example: Kitsune Mystic / Autumn-Tail, Kitsune Sage
Power-doubling effects like Unleash Fury, Two-Handed Axe, and Calamity Bearer pair wonderfully with Double Strike-outlets like Duelist's Heritage, Embercleave, and Arashin Foremost, resulting in a quadruple damage per swing
If you have a creature with persist and a sacrifice outlet, the combo is complete
EA foils are already running in lower supply
Options include: Myriad Landscape, Terrain Generator, Wayfarer's Bauble, Coldsteel Heart, Sky Diamond, Sol Ring, Sapphire Medallion, Extraplanar Lens, Caged Sun, Gauntlet of Power, Burnished Hart, Mind Stone, Worn Powerstone Surveyor's Scope is severely underused but shines brightly in Talrand, Sky Summoner decks
If you begin the game with this land, its not much different than having a Mox Diamond and definitely signifies that youre willing to trade resources to turbo ahead of other players at the table