Bloodthirsty Conqueror + Dina, Soul Steeper

Prerequisites

You have a way to gain life.

Steps

1. Gain life.
2. Dina triggers, causing each opponent to lose 1 life.
3. Bloodthirsty Conqueror triggers for each opponent that lost life.
4. Resolve a Bloodthirsty Conqueror trigger, gaining 1 life.
5. Repeat from step 2.