Ice Ring

The Ice Ring is the third ring unlocked in the game and is unlocked upon reaching stage 300. The ring is charged by holding down instead of tapping and deals more damage the longer it is held then released.

Ice Ring has 17 available runes; 4 of them are rewards for progressing in Adventure mode.

Runes

Name	information	How to obtain
Avalanche	Each shard that doesn't hit an enemy increases the damage of the next shard that hits by (50-100)%	Flash Offers and Rune Chests
Bleak	Tap and hold during Blizzard to increase its duration by (200-300)%	Flash Offers and Rune Chests
Blessing	Increases the mana pool of the ring by (100-200)%.	Flash Offers and Rune Chests
Cold Blood	While charging, every 1s increase a random hero's next attack’s damage by (50-200)%	Flash Offers and Rune Chests
Cold Wind	Critical hits slow down the enemy attack by (50-80)% for 3 sec.	Flash Offers and Rune Chests
Freezing Mist	(9-20)% of a random hero damage is applied to shard damage for every hit that the ring makes	Flash Offers and Rune Chests
Frost Armour	Each shard has a 25% chance to reduce damage taken of all heroes by (1-12)% for (1-2)s	Flash Offers and Rune Chests
Glacier	Deals +(400-550)% damage to stunned units. -50% otherwise.	Flash Offers and Rune Chests
Ice Blast	Increases the charging & speed of Blizzard by (50-72)%.	Reach stage 475 in Adventure Mode
Ice Grasp	While charging every (1.2-0.5)s a random enemy is damaged for (130-350)% ring damage.	Flash Offers and Rune Chests
Ice Rage	Killing an enemy with shards refills (20-41)% of the mana pool.	Reach stage 540 in Adventure Mode
Nova	Blizzard rains (25-75)% slower, increases shard hit area.	Flash Offers and Rune Chests
Sharpness	During a Blizzard, every shard that hits enemy boosts the remaining shards damage by (20-40)%.	Reach stage 665 in Adventure Mode
Shatter	(50-70)% more shards, each dealing (25-5)% less damage.	Flash Offers and Rune Chests
Snow Mana	Every (21-??) critical hits charge the ring by 10% [needs to be confirmed]	Flash Offers and Rune Chests
Stinger	Every (1.2-0.1)s, drops a random shard.	Flash Offers and Rune Chests
Stormer	Full charge of the ring increases critical hit chance by (9-20)%.	Reach stage 350 in Adventure Mode

How to obtain runes

Runes can be obtained opening Rune Chest, occasional Flash Offers, or via the Rune Special Offers all found in the shop.
Only runes for already unlocked rings can be obtained from Flash Offers, but you can obtain runes early from the Rune Chest.

Note: Rune Chests contain duplicates and give a very small amount of spirits in return. They are not recommended to use outside of the very beginning of the game for this purpose.