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It does not require a TCG purchase or even a minimum order amount

During your next Standby Phase after this effect was activated, you can attach 1 "Techno HERO" Monster from your graveyard to a "Techno HERO" Xyz Monster that was Special Summoned by this card's effect

Arbor Elf Arbor Elf differentiates itself from other mana dorks simply by untapping a land instead of generating mana

Absolutely, but even if that deck didn't have landfall, there might be great reasons to include fetches

2 Kassandra, Eagle Bearer Now this is Sparta

Something strong enough to have an impact, but subtle enough that it doesnt completely warp the opening turns