The MellowLeaf tree

A tree type that only naturally generates underground, this trees usually can be found around ravines or huge caves that has an opening on the ceiling for sunlight to get in. This tree type is mostly 5-6 blocks high with its trunk only generating around 4-5 wood logs. How the leaf blocks generate is quite different; from the bottom trunk going to the tip is covered by leaf blocks, like no exposed wood log that can be seen, it would most likely look like a pyramid of leaves. In average it generates 7x7 leaf blocks on the bottom part and less going up. What makes this tree type unique (other than new wood log/plank and leaf textures) is the leaves has a use. So I said that it generates around deep holes like ravines, where I mostly unknowingly fall into, sometimes intentionally, and usually this holes are high enough to die from, so I would like a naturally generating block that saves you from fall damage in early game, like a hay bale but does it better. Like a pillow, instead of bouncing off it like slime blocks, you just fall on the leaf block but takes less damage and no bounce, with an added bonus of getting wood planks out of the tree when you get trapped in a hole. Of course the leaf can be silk touched and be use outside of its main purpose.