"Galaxy-Eyes Tachyon Dragon" (ギャラクシーアイズ・タキオン・ドラゴン Gyarakushīaizu Takion Doragon) is an archetype of LIGHT Dragon Xyz Monsters used by Mizar in Yu-Gi-Oh! ZEXAL. It is a sub-archetype of the "Galaxy", "Galaxy-Eyes", "Tachyon" and "Tachyon Dragon" archetype.
In the anime, Mizar would often use "Galaxy-Eyes Tachyon Dragon" against Kite's "Galaxy-Eyes Photon Dragon" to determine who is the true "Galaxy-Eyes" master. "Galaxy-Eyes Tachyon Dragon" cards rely on negating the effects of other cards on the field, whilst also launching additional attacks.