Also known as: 氷結界の龍トリシューラ, 氷結界の龍, トリシューラ
A three-headed Dragon-type Synchro monster in the Yu-Gi-Oh! card game. Because of its powerful effect, it has spent much of its existence being either "Forbidden" or "Limited" on the Yu-Gi-Oh! Forbidden/Limited list. It is also one of the three dragons sealed by the ice barrier alongside Brionac Dragon Of The Ice Barrier and Gungnir Dragon Of The Ice Barrier.
Later infected by the Evilswarm and becomes Evilswarm Ouroboros.