This elegant loop relies on a continuous chain of triggers that feed into one another once you initiate the cycle with an initial source of lifegain. Whenever you gain life, The Destined White Mage triggers to place a +1/+1 counter on a creature, which in turn causes Invisible Woman, Sue Storm to generate a 0/4 Wall token. That new creature entering the battlefield immediately causes Prosperous Innkeeper to trigger and restore your life, looping right back to restart The Destined White Mage's ability. It is a wonderfully thematic way to snowball a board state into infinite tokens, life, and counters!