Radius, the Half-Moon Dragon

Radius, the Half-Moon Dragon was released in the 2013 booster set Lord of the Tachyon Galaxy, a pivotal expansion in the Yu-Gi-Oh! Trading Card Game. This set introduced the Barian sub-series, which drew direct narrative inspiration from the Yu-Gi-Oh! Zexal anime series, specifically the conflict involving the Barian Emperors. The card was designed as a low-level effect monster intended to support players utilizing rank-four Xyz strategies, which were central to the competitive meta of that era.

The artistic design of Radius incorporates the celestial, ethereal aesthetic characteristic of the Barian monsters, featuring crescent moon motifs and metallic, armor-like plating. As a common rarity card, it served as accessible filler for deck-building, allowing players to bridge the gap between early-game setup and the more powerful Xyz monsters that defined the set's competitive focus. It remains a recognizable piece of the mid-Zexal era card design, reflecting the game's shift toward high-speed special summoning mechanics.