In wild, if you play Renounce the Darkness right before completing the quest, the hero power will overwrite the hero power given by the card (which is its biggest drawback as you can't live tap anymore). The quest annihilates the drawback and allows to draw a 0 zero mana card every turn for big tempo swings or value bursts if the RNG god is with you (nowhere near competitive ofc but it's another way to play renounce)