Fiend Skull Dragon is a Dragon Fusion Monster with Attribute WIND, Level 5, ATK 2000, DEF 1200.
Fusion Summons typically need listed materials and a Fusion method (Polymerization, contact, etc.).
On the current TCG and OCG Forbidden & Limited lists tracked here, Fiend Skull Dragon is Unlimited.
YGOPRODeck lists Fiend Skull Dragon for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Fiend Skull Dragon belongs to the Archfiend archetype—use that tag when searching for engine pieces and tech options.
A listed print of Fiend Skull Dragon appears in Dark Beginning 2 (DB2-EN154) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Fiend Skull Dragon is about $0.82 on Amazon (prices change frequently).
