This nightly build opens up some really fun possibilities for you. We've created a spawnPrefab function, which can be called on orbs at any time. It takes a name, finds the prefab with that name, and spawns it at the location of the orb.
...will create an aggressive croaker at the orb.
We've exposed all these things you can summon, so try them out! (more to come)
Have fun y'all!