Forgath looked around with something of a laugh, only to stop stark as he saw his two minions slowly backed down the tunnel by forms crawling around the rounded opening.  That far away for Forgath's magic, the light was dimmer, and Puffy was having to focus on sweeping shield bashes and darting motions to keep Plump safe.  Were they not there, Forgath would simply fill the tunnel with his flame, but he didn't trust Puffy's shield to protect them well enough.  The second option then; he called more magic out, the one hand burning brighter while reaching the other down to slap against the water flowing from the tunnel.  A crackling line of his power ran up the stream towards his minions; he felt it gather beneath one of the centipedes before bursting forth in a spike of ice.  The unaware creature had no chance to dodge, and it was impaled through its chitin against the ceiling.