Senseless Rage is a common Enchantment — Aura card from Shadows over Innistrad (SOI), collector number 180. Current market price: $0.06 (foil $0.45), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+2. Madness {1}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)