Detect Magic

For the duration you can sense the presence of magical effects within 30 ft of yourself. If you sense such effects, you can take the Magic action to see a faint aura around any visible creature or object that beats the magic and if an effect was created by a spell, you learn the spell’s school of magic. The spell is blocked by 1 ft of stone, dirt, or wood; 1 in of metal; or a thin sheet of lead.