the magical black sword Dyrnwyn. Fflewddur also states that Taran was involved in the ambush, baffling everyone. With Achren's help, the truth is determined: Arawn himself has come from Annuvin to the verge of Caer Dallben in the guise of Taran, in order to lure Gwydion into the ambush. Because Dyrnwyn may be pivotal as a threat to Arawn, Dallben consults the oracular pig Hen Wen to determine how it may be regained. During the reading, the ash rods used to communicate shatter and the two thirds of Hen Wen's answer are discouraging and vague. When Gwydion heals sufficiently, he sets out with Taran and others to meet with King Smoit. Gwydion insists that he alone should enter Annuvin to seek the sword, but Smoit's Cantrev Cadiffor is on the way. The small party divides, as Rhun and Eilonwy intend to visit the ships of Mona en route. When Gwydion, Taran, and others reach Caer Cadarn, they are imprisoned by Magg, the treacherous former Chief Steward of Mona, who has entered service with Arawn and taken over the fortress. When Eilonwy approaches with the other party, she detects something amiss and they cautiously send Fflewddur Fflam to the fortress as a bard. After entertaining the soldiers for a night, he returns with the bad news. Then the companions encounter Gwystyl of the Fair Folk outside the stronghold, en route home after closing the waypost near Annuvin, personally bearing final observations to King Eiddileg about preparations for war by Arawn's forces. With Gwystyl's assistance and store of magical smokes, fires, and concealments, the companions break in and free the prisoners. The plan goes awry, however; King Smoit and his men are finally able to regain control only by Rhun's intervention, which costs his life. Learning from Gwystyl of the activities in Annuvin, Gwydion turns from the quest for Dyrnwyn to planning for battle at Caer Dathyl. Gwystyl, Fflewddur, and Taran leave to gather support, respectively from the Fair Folk, the northern realms, and the Free Commots. Kaw, sent out by Taran to reconnoiter the enemy, is attacked by Gwythaints while spying near Annuvin, but manages to reach Medwyn, who asks all the creatures of air and land to oppose the forces of Arawn. Taran, Coll, Eilonwy, and Gurgi muster the Commots, who rally to their friendship with Taran, and sends them marching in groups to Caer Dathyl while the smiths and