Activate Warren Soultrader by paying 1 life and sacrificing another creature, creating a Treasure token, a Food token and a 1/1 Squirrel creature token.
Repeat step 1 one additional time.
Activate the Treasures by tapping and sacrificing them, adding ({2} magic symbol) .
Activate a Food by paying ({2} magic symbol) , tapping and sacrificing it, causing you to gain 3 life.
Repeat.
Notes
Once you have infinite life, you may forego sacrificing the Foods and/or Treasures.