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Still, the cost in terms of occupied sideboard slots is big and I recommend going for Ancient Grudge + Stomping Ground only if you expect to see a lot of artifact decks, mainly Hammer it should give you a lot of percentage points in the matchup

Breath of Life

Tana, the Bloodsower is one of the few generals Ive seen played on her own, using pump spells and equipment to spawn a saproling tribal deck

If you dont want to spend money, you could also just download TCGP and see if you enjoy pulling cards from packs digitally. While knowing where to buy cards and how to start collecting is helpful, the most important thing is to enjoy the process

In black and green, the options for creature recursion and sacrifice outlets are numerous, so consider Gravecrawler or Reassembling Skeleton, or cards that are already mutants (and believe me, we expect more) and think of them as draw two cards when they die