Blast of Jupiter

Blast of Jupiter is an event that takes place during the Phantom Lord arc.

Prologue
Phantom Lord declares a Guild War against Fairy Tail when Gajeel Redfox destroys its building. The Guild gets ready for a payback and breaks into Phantom Lord. However, in the battle, Makarov gets deprived from his Magical power, making Fairy Tail retreat. Back at the Guild, the Mages realize that while they were away, Phantom Lord captured Lucy. Natsu manages to rescue her and brings she back to the Guild where everyone's planning on another confrontation. The discussion suddenly ends, when they see the Phantom Lord Building coming towards them on large, mechanical legs. Jose, the Guild Master of Phantom Lord orders to fire their secret weapon: the Magical Convergent Cannon - Jupiter. Erza shouts to get down and prepares to stand against it...

Blast
Erza requips her Adamantine Armor to stop the blast and save the Guild and her guildmates. Everyone is shocked about this act and they try to stop her. However, Erza remains solid, still shouting to get down. Natsu tries to get to her, but Gray stops him. When Phantom Lord fires Jupiter, she uses Adamantine Barrier which combines the armor's two shields into one large as she gets ready for receiving Jupiter. Erza's armor gets destroyed in the impact, but she manages to withstand and stop the blast. After the smoke clears, the Mages see the Guild unharmed. However, Erza got heavily injured.

Aftermath
Fairy Tail soon realizes that though Erza saved them, she is now unable to fight, too, next to Makarov. Jose says they now don't stand a chance and requests to hand over Lucy. Erza, with the last of her strength, yells that they will rather die than hand over a comrade. The whole guild agrees with her. Jose gets enraged and shouts that in 15 minutes, they will fire a bigger and stronger Jupiter. Then he send out his Shade Troopers to exterminate Fairy Tail. Seeing Erza is down, Cana takes the leadership and sends Natsu and Happy to somehow stop Jupiter from firing another blast while the rest of the Guild tries to stop the Shades. Elfman and Gray gets after them, too.