Staff of Spike Growth

Range of 150 feet.
Concentration, duration up to 10 minutes.
Spikes sprout in a 20-feet cube at a target
location. The terrain becomes difficult and
targets passing through take 2d4 piercing
damage for every 5 feet traveled.
The spell itself is camouflaged and may go
unnoticed if casting is not observed.
Holds up to 1 charge which is restored upon
taking a long rest.