Twice a day a hundred vaults break through the ground across Lorencia - scattered wide, never in a heap, and they stand still. Four minutes later whatever is left sinks back. In the middle of the city a golden chest appears for the same four minutes. It is the only way to the errtels, and it will not open for nothing. A warning goes out five minutes before each wave.

Three silver keys and three gold keys. First one to reach the chest takes the prize - there is one chest per wave, and two waves a day.

• Break a vault and it drops a key seven times out of ten.
• Of those keys, about one in seven is gold - the rest are silver.
• Keys rot after ten minutes. Nothing carries over to the next wave.
• The chest asks for three silver and three gold; short of that it tells you exactly what is missing.
• Open it and the errtel goes straight into your bag - keep a free slot.

The reward is a single errtel of random element and random options. Four of five are the common kinds - Anger, Blessing, Integrity, Divinity. The fifth is Radiance, and that is where the rare effects live.

Errtels go into a pentagram - five slots, one per kind. Thompson Kenel sells the pieces: errtels of every kind, emblems, elemental runes, mithril, and Norrwen's Bloodstring Lyra at +15 with all five slots open.