Daring Do and the Catacombs of Causality

The Room of Doors

You touch one of the runes, and quickly recoil when it lights up. No traps appear to have been triggered, fortunately.

You decide to take a clue from the page and touch all of the prime numbers on the column.

Each one lights up in turn, and when the last one is lit, there's a faint rumbling sound. The sigil on the North door is now glowing magenta.

The numbers cease glowing after a few seconds have passed.

Awesome.