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If you do, and you accept another player's offer, that player won't be able to use the second ability to offer another exchange
Creatures (5) Lands (19) Spells (36) 3 Disrupting Shoal 4 Blazing Shoal 4 Peer Through Depths 4 Dragonstorm 4 Muddle the Mixture 1 Snapback 1 Pact of Negation 1 Summoner's Pact 4 Ponder 4 Spell Pierce 4 Preordain 2 Gitaxian Probe Sideboard In Legacy, Preordain has mostly been overshadowed by Ponder and Brainstorm, but in Vintage, where those two are restricted, Preordain is king
Then, cast Restoration Angel and use the ETB trigger double by Panharmonicon to exile both Felidar Guardian and a second non-Angel creature
They are expert hunters, gatherers, and herders, working alongside their formidable animal companions.
The fact that Mend the Wilds is an instant makes this card a lot better, since you can cast it right before your turn and most likely get to draw whichever permanent you got back from your graveyard