ThunderCats S01 E11

ThunderCats S01 E11 "The Forest of Magi Oar"
In the Forest of Magi Oar, the ThunderCats send Wilykit, Wilykat and Snarf to search for firewood. After they return, they start a fire and lay down to rest. Lion-O confronts Tygra about his frustrations that the Sword of Omens is not working. Tygra implies that Lion-O is not the right person for the sword, displaying his jealousy towards Lion-O's confrontations with Cheetara. Lion-O throws a piece of firewood into the fire, releasing several evil spirits around them. When ThunderCats cannot defeat the spirits, they meet the Wood Forgers, who have a talent for using paper magic in combat. The Wood Forgers, led by Zig, lead them back to their home, where they have a School of Paper Arts and a paper mill. They tell Lion-O about a monster bird known as Viragor. The ThunderCats come to their aid when the Forest of Magi Oar is threatened by Viragor, and Cheetara loses her staff to the monster. Lion-O is captured by the monster and abandons the Sword of Omens. Viragor explains to Lion-O that he has protected the forest for decades, and the Wood Forgers are slowly destroying the forest. Lion-O learns that he cannot use his sword against the spirits because it can only be used to defeat evil, which suggests that the spirits are friendly. Lion-O returns on Viragor to tell the rest of the ThunderCats the truth, much to the Wood Forgers' disappointment. They begin to fight, and Lion-O and Viragor crash into the forest. Lion-O finally regains use of his sword and defeats Zig. Viragor makes Cheetara a new staff out of Magi Oar wood. Lion-O uses Sight Beyond Sight and finally locates the stone's next location.

Note: This episode was once titled "The War Forgers".