Scepter of Tn'kaneid:

Once per session, the wielder may cast the Clairvoyance spell without paying its mana cost with immunity to magic malfunction. The wielder may spend a charge to treat the roll as a natural 20 for the purposes of the level of detail gained and no magical barrier, spell, or non-Legendary artifact may prevent it from working. The wielder may spend 8 character magic to gain another charge. Charges: 2/2