While the spells are being cast, Gashur hurls the Lucerne hammer towards the exit to make sure it is not just lying around when the ooze comes. Then he draws a javelin snd gets ready to throw, all his muscles tensed.
SpoilerRound 1: throw the hammer (standard)
Round 2: initiate rage (free), enter stance (move), ready attack (standard)
Readied cold iron javelin: (1d20+4)[16] for (1d8+9)[17]