Barton

reflects the sorcerer’s true power. The sorcerer concentrates a massive amount of energy into a huge ball, resulting in a powerful bolt that moves forward and has a chance to knock down enemies. This skill can be the perfect start with an enemy who is not on the spot start against the caster, no wonder they blow. Blastball is a charged skill and its assigned button must be held down in order for it to gain full charge.
Quote:
Tera Blastball II
Cast Time: 0.5s.
Cooldown: 10.0s.
MPTera Gold): 12.
A power charged skill. Shoots a huge magic ball forward. A magic ball gives a penetrating damage up to 8m in range. An attack is executed as you release attack button. Attack power increases while holding an attack button.

Blastball III
Cast Time: 0.5s.
Cooldown: 10.0s.
MP: 12Tera Gold.
A power charged skill. Shoots a huge magic ball forward. A magic ball gives a penetrating damage up to 8m in range. An attack is executed as you release attack button. Attack power increases while holding an attack button. 

Due to the fact that many of the skills earned early on are upgraded in subsequent levels of Tera, rendering them much more potent. As the archer progresses through levels, a noticeable increase in damage output is quite clear. Added to the archer’s armory in the higher levels are several skills that no archer would ever want to do without. Penetrating Shot, earned at level 12, is a charged shot that deals linear damage to multiple mobs. This can hit numerous mobs and has a high rate of Tera online Gold on reap mobs when lined up properly.
Penetrating shot uses significantly less mana, compared to a few other skills at your disposal, but is more difficult to pull off while being chased, and is not as efficient for initiating combat as Multi-shot or Focused shot. They key to usingTera online Gold is putting some distance between yourself and the largest concentration of targets is right, then waiting for them to line up as they come after you. Just like all of the skills though, having damaged the mobs some first is the best way to make this skill useful, otherwise mobs will be left at 1 hp(Tera Gold).