mtg sacrifice land cards 20 - Fallen Empires - Played - 4x of each - Sets - Magic FTG Sacrifice a land 5 Sacrifice Land - Invasion

Even better if you have the ability to play more than 1 land per turn

And, of course, you might have awesome new sleeves you want to outfit a deck with

Metallic Mimic keeps to the theme of buffing your pones , and Unsettled Mariner gives them a bit of protection against that one guy that thinks it's a good idea to putrefy your 4/3 flyer instead of the Eldrazi that just laid waste to the guy next to him

At the worst it'll always count itself if you control no other Wolves

Some might want Shard Convergence, another Skyshroud Claim, and a few Explosive Vegetation

You do this when you use a land to make mana, when you attack with a creature, or when you activate an ability that has the symbol as part of its cost (means "tap this permanent")