The Chain of Loyalty is one of the treasures of Thundera. It is a necklace with four circular images on it. One of Tygra, one of Panthro, one of Cheetara, and one of Wilykit and Wilykat. It is deceptively delicate as Jaga warned Lion-O and if broken, will cause the ThunderCats to fight amongst themselves. When broken, the four images change to resemble the closed eye on the Sword of Omens.
(Tygra crawling on creaking branch)
Cheetara: You've been eating too much of Snarf's candy-fruit pie!
Panthro: I have no friends. I hunt alone. Everyone is my enemy. Say goodbye to tomorrow, ThunderCat!
Cheetara: Wrong, Lion-O, I know exactly what I'm doing. I'm going to destroy you!
Tygra Not if I get there first, Cheetara! And when I've finished with Lion-O, I'll finish you!
Panthro: Another couple of hours and I'll reach the Feliner. What better place to ambush the lord of the ThunderCats!
Lion-O: This is my fault. I lost my temper with Mumm-Ra and I broke the Chain of Loyalty.
Lion-O: Wilykit, 'kat, what in the name of Jaga do you think you're doing? Stop it!
Wilykit: Oh, take a hike, Lion-O! Back off!
Wilykat: Yeah, we're sick of being bossed around by you!
Wilykit: Just who do you think you are anyway, huh?
Mumm-Ra: (thinking to himself) You may laugh now, ThunderKittens, but I'll soon make you laugh on the other side of your faces.