Thunder dragon

Thunder Dragons are enemies found in Sonic and the Black Knight in Dragon's Lair. They are small, yellow, plasma-based dragons that leave solid trails of lightning behind them. These trails can be used by Sonic and the Knights of the Round Table to move through the level. The lightning does not last very long, so unless the player moves quickly, they could lose a life if they wait until the trail disappears beneath them. Thunder Dragons can be quite useful because they are actually harmless, despite them being composed of pure electricity and the Knights of the Round Table all being clad in metal. Enemies also appear on the trails, making for more dangerous obstacles than usual.