Even if you only get a few cards off him, he's a pretty good draw engine in a Jund shell, and even as a commander he can definitely do a lot of work - he restricts what you reasonably might want to use your removal on, but turning all your removal into cantrips is quite a scary thing when he also provides a reasonable win condition on his own
(Shield counters don't prevent this damage as they're removed.) If Call In a Professional deals damage to a creature with a shield counter on it, that damage will not be prevented, but a shield counter will still be removed
Then you offer opponents incentives to attack elsewhere, like with Vow of Wilderness, Bloodthirsty Blade, or bringing some chaos with Illusionistss Gambit
Magic: The Gathering is practically its own currency at this point, with no shortage of rare and expensive MTG cards out there to buy, sell and trade
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Karplusan Forest: red or green