Fire

The bats were leaving runes as gradually the entire fortress was covered with intricate seals that connected to each other with lines of fire, creating a common system.

"Well... I didn't expect this, but was someone really expecting us to come? I don't believe it." Wain said with a calm look before heading for the wall.

A lightsaber appeared in his hand as he took a few swings. The compressed energy of the light could share even space, but the barrier remained perfectly intact, taking all the damage.

Bam.

Several spheres of green flame flew into the same place that had enough power to hurt the Dragon, but, once again, there was no result. This barrier seemed indestructible.

"Damn... It was harder than I expected, but what happens next...?" Wain muttered with a confused look while looking at the fiery bats.

They sat down on the stone ledges and just stared at Wain and Marlis as if expecting something.