My most insane prediction is that now that we have seen Elan cast Mass Cure Moderate Wounds, he has enough Bard levels to know two 6th level Bard spells.

Mass Cure Moderate Wounds is one. The other? Looking at d20, I say the only "logical" choice is... Irresistible Dance!! -- just because that would be the most Elan thing to do ever, and I am nearly 100% sure he would want to spread his zest for life by making people dance at some point.

It'll even save the day somehow. I just know it! 😆