Possible to warp somewhere after a layer is empty?

[Xirix]

Example, I put all 5 Dragon coins on their own layer, can I have an event that triggers after collecting them all, ie "No objects in layer" and make it so it warps the player character somewhere?

[RudeGuy]

You can make a layer for the warp and put istant warps on all the dragon coins. The event which is triggered after collecting the dragon coins will show the layer of the warps.

[bossedit8]

This is actually possible and it works on most of the NPCs that can be defeated/collected by the Player or similar. You just have to make a new Layer related to your Warp (like a Warp Pipe) and one Event that triggers that the Warp is gonna appear after all NPCs has been defeated by it's own Layer.