Abel was aiming for the body of the Cliff Magic Tower. He wanted to use his first arrow to test the strength the legendary mourning stone was.
Ding.
After flying through the air, the arrow and net were shot into the magic tower. The mourning stone was shaped like an arc, so it did manage to deflect a lot of the force that was directed at it. Still, the arrow ended up being stuck between two of the stones.
At the same time, the Cliff Magic Tower was already activated. A siren rang through the entire structure.
"The Magic Tower is under attack. I Repeat. The Magic Tower is under attack. The strength of the attack is currently being calibrated. The protection barrier is being activated."