Map points for "shardslanding.txt" map file (note for all Shard's Landing named map points, see this quest entry):
PH is "a corrupted coralspine".
Plaguespine has ~3.8 million hitpoints and hits for a max ~13,100. It casts "Unceasing Corruption" every 30 seconds. If this is cured, "Plaguespine's Spite" is cast on the curer.