(Couldn't find a gif for Seieiryuu Senga :/ )
This is an incredible moment in Fairy Tail! The battle between these characters is intense. I won't go into details because I hate ruining good fights, but I will say this was awesome! Not only is Unison Raid of Sting and Rouge one of my favorites of all time, but the way Natsu's attack effortlessly punches through it is amazing to see!