Impossible to capture it all in a screenshot, but this Miner event yesterday seemed to have every phase active at once, There was a red Cavecrawler, large green and blue mushrooms, and smaller mushrooms of every colour, with the Crystal Worm Father active too.
No idea how it got like that as it was like that when I arrived. It was a Realm that had been opened for a while, which I jumped into when the other Realm went to Oryx, farming for book pages XVII and XIX. Not too hard to clear sniping from the edge and shooting whatever I could tempt closer.