Since Kyriotates of Eli can use the Celestial Song of Form for free, does this mean they can make their hosts the size of Blue Whale or a dinosaur?
Ack, no! They can use the Song as if they were full up of Essence (9 for a starting character), they just don’t actually have to spend the Essence. If the Kyrio chooses to, they can actually spend some Essence to go beyond those limits. (So if a 10-Force Kyrio of Eli spends 5 Essence on the Celestial Song of Form, it’s as if they had performed the Song and gotten 15 Essence worth of changes.) You can do great Giant Rat of Sumatra impressions, though.