Fjord's Stave of Sentience

Fjord’s stave of sentience was originally designed in 3301 NY to cause the instantaneous growth of plants in an enclave. An error in the incantation occurred and the staff imbued temporary sentience to all plants within 100 feet. The sentience effect couldn’t be controlled and was always in effect, even outside the effect of the mythallars.
When a plant became sentient, it was not under the control of the staff wielder. The plants seemed to remember those who had caused them harm. These people were attacked by all plants within range. Trees acted as treants and hangman trees; grass and bushes trapped their victim (like the entangle spell). A theory circulated shortly after the staff’s first use claimed that seeds germinated within the sphere of effect of Fjord’s stave of sentience would beget sentient plants, even when the effect was removed from the area. This theory, however, was never proven.