Twin-Headed Thunder Dragon is a Thunder Fusion Monster with Attribute LIGHT, Level 7, ATK 2800, DEF 2100.
Fusion Summons typically need listed materials and a Fusion method (Polymerization, contact, etc.).
On the current TCG and OCG Forbidden & Limited lists tracked here, Twin-Headed Thunder Dragon is Unlimited.
YGOPRODeck lists Twin-Headed Thunder Dragon for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Twin-Headed Thunder Dragon belongs to the Thunder Dragon archetype—use that tag when searching for engine pieces and tech options.
A listed print of Twin-Headed Thunder Dragon appears in Dark Beginning 2 (DB2-EN069) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Twin-Headed Thunder Dragon is about $0.34 on TCGPlayer (prices change frequently).
