While likely powerful in Standard, the Stalker will truly shine in the likes of Modern, where regular Fetchland activations can guarantee he beefs up quickly, He also plays nicely with instant-speed tricks, since you can use his activated ability even if he attacked last turn: a nice tip to remember for all formats
Many game stores are known to buy boxed bulk for a certain amount per 1,000 cards, and you could even try to sell a huge collection of commons as a lot on somewhere like Facebook Marketplace
The reverse side of Invasion of Tarkir also synergises well with the 'dragons matter' theme in Tarkir Dragonstorm
In this case, both sides of the battle are equally impressive
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Another reason faeries feels less pure than something like merfolk is that there is very little synergy that requires the tribe type