This delightful loop relies on a closed-circuit synergy of lifegain and counter-placement that feeds endlessly into itself. It all starts when you trigger the Level 2 ability of Cleric Class by gaining life, which places a +1/+1 counter on Invisible Woman, Sue Storm (or another target Hero). That counter placement immediately sparks Invisible Woman's trigger to manufacture a 0/4 Wall token, and the moment that token enters the battlefield, Angelic Chorus steps in to reward you with life equal to the token's toughness. Thanks to Cleric Class boosting every instance of life gained, this cycle generates a net-positive loop that fuels itself indefinitely, resulting in unbounded creature tokens, endless entry triggers, and towering +1/+1 counters.