Void Egg

https://growtopiawiki.nbg1.your-objectstorage.com/uploads/8/8f/ItemSprites.png Combination
In any Chemical Combiner, mix together...
https://growtopiawiki.nbg1.your-objectstorage.com/uploads/8/8f/ItemSprites.png Stone Egg (×1),
https://growtopiawiki.nbg1.your-objectstorage.com/uploads/8/8f/ItemSprites.png Lava (×200) and
https://growtopiawiki.nbg1.your-objectstorage.com/uploads/8/8f/ItemSprites.png Wriggling Tentacle (×1).
This recipe will yield 1 item.

The Void Egg is an unsplicable non-solid foreground block which was added in the Dragon Invasion update.