The Flesh Is Weak is a rare Enchantment card from Warhammer 40,000 Commander (40K), collector number 122. Current market price: $0.37, TCGplayer market prices via Scryfall.
When this enchantment enters, put a +1/+1 counter on each creature you control. Creatures you control with +1/+1 counters on them are artifacts in addition to their other types. Nonartifact creatures get -1/-1.