Chaga mushroom

I'd like to see chaga mushrooms added to birch forests. The chaga is a powerful, healing mushroom which is harvested primarily from birch trees. The player can decide to take the whole mushroom which means it will not regrow, or leave a portion so it can grow back on the tree and the player can come back and get more at another time. It can be a relatively rare item with great health-giving properties, or less rare with less powerful properties. It could either be used immediately or need to be processed. In the real world the chaga is broken into chunks and or ground into powder for tea.

The chaga is a black, shaggy mushroom. It would be fun to see it growing in a birch forest.