Agave

This rare plant of the nether would be needed to tame the red dragon. Breaking one, would produce a lava flow. Though when harvested correctly using a hoe, it would produce an item that the red dragon would come down to try. If the player were on fire, consuming this item would put out the fire, though it would not be a useful food source.

                It would require dry water, or lava source to grow in the overworld.