Icehearts can be found in minor iceheart and major iceheart versions.
Price (Item Level): 24,000 gp (15th)
Body Slot: —
Caster Level: 5th
Aura: Faint; (DC 17) evocation
Activation: As spell used
Weight: 1 lb.
This fist-sized lump of magical ice has been infused with the storms and bitter cold of winter. On command, a minor iceheart can produce the following effects:
Prerequisites: Craft Wondrous Item, fog cloud, ray of frost, sleet storm, creator must be an uldra or a winterhaunt of Iborighu.
Cost to Create: 12,000 gp, 960 XP, 24 days.
Source: Frostburn, page 110.
Price (Item Level): 140,000 gp (22nd)
Body Slot: —
Caster Level: 15th
Aura: Strong; (DC 22) transmutation
Weight: 1 lb.
A major iceheart looks similar to a minor iceheart, except that it is constantly surrounded by a swirling vortex of snow and ice to a radius of 1 foot. Creatures holding a major iceheart take 1d4+1 points of cold damage per round as the powerful magic of the device leeches heat from the body. On command, a major iceheart can be used to produce the following effects:
A major iceheart’s most awesome power is the ability to create a fimbulwinter once per day. A major iceheart casts this spell automatically each day at sunset, unless it has already been used that day to create a fimbulwinter. Thus, the mere presence of a major iceheart generates a 15-mile-radius zone of eternal winter; the majority of frostfell regions that appear in temperate or tropical climates are the result of the introduction of a major iceheart into the region.
Prerequisites: Craft Wondrous Item, cone of cold, fimbulwinter, fog cloud, ice storm, polar ray, ray of frost, sleet storm, creator must be an uldra or a winterhaunt of Iborighu.
Cost to Create: 70,000 gp, 5,600 XP, 140 days.
Source: Frostburn, page 140.