<P> A tree that Maleficent left burning for eternity is shown in the forest . </P> <P> The Enchanted Forest events take place after "Labor of Love (Once Upon a Time)" and before "Fruit of the Poisonous Tree". The Storybrooke events take place after "Unforgiven". </P> <P> In the Enchanted Forest, before the Dark Curse, Rumplestiltskin finds Regina exploring Maleficent's spell book . However, Rumplestiltskin tells her that she is rushing into this too fast, saying that the key to Maleficent's skills is time, and sends Regina to Maleficent's palace, where she sees a tree still burning from Maleficent's wrath "half a lifetime" after she burned down a forest . Regina enters Maleficent's palace to discover a disheveled, depressed Maleficent; the sorceress explains that an encounter with Briar Rose drained her of all her spirit . Regina tells her that Briar Rose's daughter, Aurora, is about to be married . Regina is furious to see heroes getting happy endings, and, after Maleficent reveals that her fire and ability to transform into a dragon has disappeared, Regina decides to use the royal wedding to inspire Maleficent . </P> <P> Regina takes Maleficent to the remnants of the forest that the sorceress once burned and shows her the tree that is burning eternally . Maleficent attempts to channel the fire back into her body but she still lacks the ability to transform and the duo are captured by King Stefan, who had ruined Maleficent's plans in the past, and his guards . Regina refuses to give up and burns through the ropes binding her hands; she throws a fireball at a guard before her magic begins to fail her, which prompts Maleficent to realize that she does not want to go down without a fight, thus rekindling her fire and allowing her to transform into her dragon form . As they reach the castle, Maleficent and Regina are able to find Aurora, whom Maleficent puts under her legendary sleeping curse . Afterwards, Regina returns to see Rumplestiltskin, who is very impressed that she helped Maleficent regain her fire . Regina reveals that she has realized that she already had the perfect teacher all along in Rumplestiltskin, and feels that there are fates worse than death, one of them being the sleeping curse . </P>

Who was the dragon in once upon a time