Noru meanders at a calm, walking pace over to the torch nearest this passage all the others seem fascinated with. Uttering an incantation and making some quick gestures as he goes along. He examines the torch with a tilted head.

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Extended mage armor cast
(1d20+17)[21] knowledge: dungeoneering to tell how long ago they were lit if mundane
(1d20+20)[39] knowledge: arcana to identify the spell involved if they are magical