Nice! A rainbow card!I might consider making it such that it is immortal if every element is represented.
Some thought will have to be put into exactly what the right cost is, but this is the first other creature I've seen that I like. Good job!
What does "elements on the field" mean? It means creatures and permanents or pillars/towers?
Things that will count as elements for its ability are: Marks, permanents other than pillars, and creature