
Enchantment
Whenever an opponent loses life, you gain that much life.

Infinite combo partner; converts your lifegain into opponent life loss.

Functional Sanguine Bond on a creature, comboing with Exquisite Blood.

Deals damage on lifegain, combos with Exquisite Blood for infinite drain.

Drains opponents whenever you gain life, completing the combo loop.

Vampire version of Sanguine Bond enabling the infinite-loss combo.

Causes life loss on your lifegain, pairing for infinite combo.

Another lifegain payoff that gains life and can finish opponents.

Big lifegain/life-loss effect with similar vampiric drain theme.
Damage dealt to an opponent usually causes that opponent to lose life. An opponent paying life also causes loss of life.
If you and an opponent both lose life simultaneously, and this causes your life total to become 0 or less, you'll lose the game before Exquisite Blood's triggered ability can resolve.