Oath of Lim-Dûl is a rare Enchantment card from Ice Age (ICE), collector number 156. Current market price: $0.51, TCGplayer market prices via Scryfall.
Whenever you lose life, for each 1 life you lost, sacrifice a permanent other than this enchantment unless you discard a card. (Damage dealt to you causes you to lose life.) {B}{B}: Draw a card.