Adamant Boots

While wearing these adamntine plated boots, you
are much more difficult to move.
Your movement speed is reduces by 5 ft. In addition, if a creature or effect would force you to
move, you may use your reaction to extend adamantine spikes into a solid surface you are in contact with to end your movement. The spikes
then remain extended until the end of your next
turn, reducing your speed to 0 during that time.