Imperial Mountain

Turns regular landscape into a massive Mountain. Gradually raise a landscape into a large mountain centered around a Rune = Imperial Mountain.

Implementation Notes

 * Select a weighted random x,z, move the blocks from rune Y level up one.  Don’t touch leave unless you get the trunk, then move the whole tree.
 * Height raised is limited to diagonal, no opening up holes in the ground.  This means that the deeper you bury the rune, the more of a vertical slope your mountain will have.
 * It will create a hollow space underneath the mountain, turning the above landscape into a tent.