[This strategy seems to be working. The dragon thrashes back toward Percy, growing weaker, and Nico prepares for another strike. But it isn't needed. The beast shudders and collapses and makes a handful of fitful wheezing noises before going still.
Nico blows out a breath, arms going slack. His sword strikes the ground. He almost - almost - goes down with it. But he manages to catch himself and stay standing.]