Reapers

This harmless-looking tree can be the end of an unwary traveler. Reapers are trees occupied by evil spirits that have turned them into highly effective death-traps. Reapers are usually rooted to the ground, but known to move occasionally. They make up for a lack of mobility with their long, tentacle-like branches and powerful magic spells. Since a Reaper's body is composed of wood, however, it can be quickly overcome with fire.

They can be found mainly in forests, especially Spiritwood, but also dwell deep within dungeons. They often hoard vast wealth, thus making excellent prey for treasure-hunters.

These deadly creatures first plagued the dungeons of Sosaria in Ultima I. Referred to as "tanglers" at the time (not to be confused with Tangle Vines), they did not then display any magical ability. Since re-appearing as Reapers in Ultima IV, they changed very little in future Ultima installments. Their changing mobility is explained as being only a very brief part of their life-cycle.

Trivia

 * Reapers were to be included in the cancelled Ultima X. Link: Ultima X Reaper