Elder Guardian Spine
The Elder Guardian Spine is a block added by Upgrade Aquatic which drop in small quantities from Elder Guardians. Elder Guardian Spines can be oriented in any direction and waterlogged. When placed, only the base of the block is visible, to extend the spine, it must be powered by redstone. While extended, they slow mob movement and halt swimming, but have a bigger range than their counterpart due to their size, as well as increased damage. In addition, mobs caught in the spine are given Mining Fatigue.