This lesser device was designed to be a limited use and limited lifespan weapon against creatures with magical resistance.
Backstory – Crafted by the ice wizard Agnarr in preparation for returning to a dangerous and desolate locale where he previously fled a linorm wyrm. Agnarr expects that the staff will assist but not guarantee his future safety.
This hardwood staff has been carved with graceful arcs, circles, and scroll-work along its length, then stained and sealed with a black resin. The style was chosen as a nod of respect to the wind wizards in the arctic north who helped save him and his companions.
It makes use of the limited lifespan rules in Ars Magica device enchantment to provide an enchanted item within a single season, otherwise Agnarr could not craft the device in one season. After seeing how handy the boost is for characters enchanting a device, the 70 year limit isn’t really a limit in most sagas, as 70 years is a darn long time in game years.
The basic effect is an improved Dagger of Ice (HoH:S) spell which hurls the ice projectile far more quickly.
Effect: Spear of Tempered Ice (CrAq/Re 46)
Creo Aquam / Rego 20, R: Voice, D: Momentary, T: Individual
As per “Dagger of Ice” (HoH:S p35) altered to be sharper and stronger, inflicting +15 damage.
(Base 3, +2 Voice, +1 Rego requisite, +2 enhanced damage)
Device mods: +5 for 24 uses a day, 70 year lifespan from first use, +21 Pen grants +42 vs MR