> Unlock mistletoe crop in the basic field. This crop will allow leveling up the ethereal tree through a basic field mechanic giving twigs, and the ethereal tree levels then allow to get next sets of ethereal upgrades and crops. The mistletoe will become available in the basic field when mushrooms become available and then needs to then be unlocked with a regular upgrade first as usual. Then it can be planted next to the basic tree to start getting twigs.