Explosive Runes

Component Cost: 10 gp and 1 healing surge
Market Price: 100 gp
Key Skill: Arcana (no check)
Level: 2
Category: Warding
Time: 1 minute
Duration: Until discharged

You scribe magical runes on an object such as a book, a scroll, a map, or a similar item that weighs no more than 10 pounds. These runes look like normal writing but function as a trap (see Explosive Runes trap.) As you inscribe them, you can create a password that allows a creature to read the runes without triggering the trap. If the trap is triggered or disabled, the ritual is discharged.

Published in Dragon Magazine 405.