Sing notices that his opponent releases a wave of wind that nullifies his wind attack as he's forming the drops of water overhead. Before he's able to complete his second attack however, he sees that he's been "magically" put into a plant bud. Now, Sing doesn't know the full extent of his opponent's abilities, and realizes his current predicament could actually be real, however he resolves that the technique is most probably a genjutsu due to the abruptness and general "demeanor" of the technique. One moment he was ok, the next, he was within a bud. Also, he didn't hear any sounds nor feel any vibrations as the bud enveloped him presumably from the ground.
Sing makes this deduction almost immediately he sees the buds. He swiftly reaches into a pouch behind him and draws out a kunai with his right hand. As he brings the kunai in front of him, he spins it acrobatically around his index finger.
Well here goes nothing...
Sing then grips the kunai firmly and stabs clean through his left palm. He makes sure to miss any important vessels in doing so. Upon stabbing himself, the illusion fades away to present Sing's opponent running at him. Sing quickly removes the kunai from his palm, performs a single hand seal, kneads a substantial amount of chakra in his lungs, and releases a catastrophic stream of flames directly at the oncoming opponent. He shapes the flames such that they do not span over a very large horizontally(roughly just less than mid range) area but are very concentrated.
After this, Sing tears a part of his suit and wraps up his bleeding palm.
(Katon: Gōen no Jutsu) - Fire Release: Great Flame Technique
Rank: S
Type: Offensive
Range: Short - Mid
Chakra Cost: 40
Damage Points: 80
Description: The user does one handseal and inhales while molding a great amount of chakra into their lungs and expelling a large stream of flames from their mouth. The user has control over the concentration of the technique, being able to produce a narrow jet of flames, highly concentrated or one that will widen along its range. The flames are hot enough to quickly evaporate large quantities of water within a relatively short amount of time.