Sinuous Vermin is a common Creature — Rat Horror card from Conspiracy: Take the Crown (CN2), collector number 46. Current market price: $0.24 (foil $0.74), TCGplayer market prices via Scryfall.
{3}{B}{B}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) As long as this creature is monstrous, it has menace. (It can't be blocked except by two or more creatures.)