Farseek can find any land with any of the listed land types, including nonbasic ones, even if that land is a Forest in addition to one or more of those types
He costs four, can't be inked, has zero for his strength and only one for his willpower
The Cloud, Midgar Mercenary card also doesnt really fit the narrative here, but it does have deliberate synergy with the Buster Sword, allowing you to search your deck for an equipment card, and his abilities also double-trigger (kind of like the Double Cut materia!)
Theres just so much of that effect to pick from in green already
It feels much like Sea Gate Restoration in the sense that you play it because its a land that might do something if you run out of gas late in the game, but you dont really plan to cast it if everythings going well
(2025-06-06) Sin's last ability doesn't cause you to move counters from Sin onto the target creature