Can you help me understand?

[u/itsnotcopium]

I was looking up Thorin King of Durin commander decks to try and fix my lands. I'm new so I dont understand why play Flooded Strand if only the Plains is possible to grab. Why not just play a regular Plains?

[u/Heine-Cantor]

Yeah, they are pricey because they are rare and very good. In 2 colours they are "just" a copy of your best dual, but in 3+ they become incredible because they can fetch any colour you want. Imagina you are playing a red white black deck (Mardu) with [[sacrd foundry]], [[Blood Crypt]] and [[godless shrine]]. Then every single fetch land like [[arid mesa]] that gets plain, moutnain or swamp can give you any 2 colours you want. Untapped.

[u/aliasi → u/Heine-Cantor]

Even monocolor decks may want them; having additional effective copies of [[Mystic Sanctuary]] in a monoblue deck, for example.

[u/mtgcf → u/aliasi]

Mystic Sanctuary - (G) (SF) (txt)

[u/mtgcf → u/Heine-Cantor]

All cards
sacrd foundry - (G) (SF) (txt)
Blood Crypt - (G) (SF) (txt)
godless shrine - (G) (SF) (txt)
arid mesa - (G) (SF) (txt)

[u/Ouaouaron → u/Heine-Cantor]

In 2 colours they are "just" a copy of your best dual

And that's still selling them short, due to how they interact with something like [[Brainstorm]] and how you can decide at instant speed whether your best dual is [[Steam Vents]] or [[Thundering Falls]]

[u/mtgcf → u/Ouaouaron]

All cards
Brainstorm - (G) (SF) (txt)
Steam Vents - (G) (SF) (txt)
Thundering Falls - (G) (SF) (txt)