Scarlet Spider, Kaine is a uncommon Legendary Creature — Spider Human Hero card from Through the Omenpaths (OM1), collector number 141.
Menace (This creature can't be blocked except by two or more creatures.) When Scarlet Spider enters, you may discard a card. If you do, put a +1/+1 counter on him. Mayhem {B/R} (You may cast this card from your graveyard for {B/R} if you discarded it this turn. Timing rules still apply.)