Kaentsubo

Kaentsubo (火炎壷 or 火炎ツボ) is an enemy in the Game Boy Advance game Wario Land 4. It is a creature with the appearance of a jar that has a blazing flame in its body, and it only appears in the Ruby Passage. If Wario goes near it, the Kaentsubo will flip and create a flame on the groung. If Wario is to make contact with the flame, he will turn into Flaming Wario, which will give Wario the ability to break Bonfire Blocks. Its name literally means "flame jar."