After hours of climbing, the storm is too strong, half-hidden behind some rocks you find a cave. Inside, the air is warm and dry, further inside, the cave splits. You notice a flickering glow from the left branch as if a fire burns just out of sight. The right branch is decorated with marble like a temple and leads into absolute darkness.

Outside, the storm howls. The cave trembles, as if the mountain itself resents your intrusion.

You can explore the left branch, or cast a spell called Darkvision, to see in the dark and explore the right branch.
You can also wait until the storm ends and continue to climb or take the risk and climb the mountains under the storm.

What do you do?