Bone Dragon Pit
From the Super Mario Wiki
The Bone Dragon Pit is characterized by sitar music and the distant roars of the Bone Dragons. In fact, the place is riddled with pits that house the Dragons. Twice a Yoshi had to explore some of these pits, and had to clash with a three-headed dragon in each. Even above the pits, the necks of the dragons still rise to attack the common trespassers.
As they continued to look for happiness, the Yoshis got lost in a dark cave. Inside lived Bone Dragon. If the Yoshis stayed, they'd surely be eaten. They escaped, of course. No Yoshi wants to become lunch for a dragon!
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