The Decision Tree

The Decision Trees are massive plant-shaped life forms in the dungeon. They are passive, and appear both open to and capable of communication and trade.
It is described as, "A trunk, really, was the only way to describe it. It had a thick, black plastic outer layer. It was actually two parts, not just one; two massive cables, coiled around an actual support pillar. Small bits of white paint peeking through the massive cords wrapped around it. A handful of smaller cables coursed up around the outside, occasionally splitting off to form small branches, or coiling together to make knots and bulges." With "Shapes of dim glowing plastic coming out of the coils at the peak of the plant where they spread out. It was like a tree, with shapes of petals and leaves growing like lotus blossoms. They were computer monitors. Folded, warped, nowhere near the standard golden ratio rectangles that sat on desks across the world. But still recognizable as a staple of the personal computer. They covered the sky above them. Blooming off of the cables where they grew out from the main trunk, blocking out the view of the lights above and casting a strange glow down into the twilight they left below. Screensavers of dancing color lit many of them, neon blues and oranges moving across panels of glass"
The Decision Tree is named as such because the monitors that grow on it show 'options' whenever someone near it is in the process of deciding on a course of action. The intent and result of this is unknown. It also hosts dozens of small creatures dubbed 'monitor lizards', that appear to have scales made of similar material to an LCD monitor. Which seem to act symbiotically
While it does not actively hunt, the tree does appear to value yellow orbs, and has (via the monitor lizards) exchanged its "fruit" for them. The fruits that grow in the blossoms of monitors are purple orbs; so far only of the smallest form, but still the only place they have been seen to occur naturally.