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As for Sam, Lotal Attendant, he is a 2/4 creature that creates a food token at the beginning of combat on your turn

It has no notable vulnerabilities beyond its cost, and thats doubly true now that Divide by Zero is gone

Riptide Shapeshifter Rarity: Uncommon TYPE: Creature SUBTYPE: Shapeshifter CMC: 5 Mana cost: USD: $0.30 EUR: 0.24 TIX: 0.04 EDHREC RANK: 22534 (3/3) , Sacrifice this creature: Choose a creature type

The lifecost is interesting, since black has historically been better at card draw than green, but this seems to argue in a different direction, although green has always been good at drawing through creatures, specifically

A card is face down in the exile zone only if the effect or action that put it there specifically says it puts it there face down (like the foretell ability)