Snow Sapphire [Heavy Armor 162]

[Shadow Era]

Name: Snow Sapphire
Casting Cost: 6
Classes: Warrior, Mage
Defense: 2
Durability: 4
Effect: Enemies that attack your Hero are frozen until the end of your next turn.
Flavor: "Frozen beauty, encased in ice..."

Eternal fame and glory go to both Benjee007 and AnAdolt for their suggestions.

[Benjee007]

Name: Archaic Plate
Cost: 6
Effect: When your hero is attacked by opponent's ally, the ally is frozen for one turn.
Defense: 6
Flavor Text: Its not only heat that convects.

[Ice]

Name: Armor of the Arctic Conqueror
Cost: 6
Effect: Enemy allies dealt damage by your hero is dealt an additional 1 damage and are frozen until your next turn.
Defense: 3
Durability: 5
Flavor: "Soon, you, too, will know only the cold of the north..."

[Mattosai]

Name : Crystalline Plate
Cost : 6
Effect : Each time an opponent ally damages your hero, he become encased in a tomb of ice (cannot attack/defend and use abilities) : opponent must pay 2 to remove this effect.
Defense : 3
Flavor : "Please sleep.... forever."

[Lost Time]

Name: Shroud of Frost
Cost: 6
Effect: When your hero is attacked by allies, choose one of the attacking allies. This ally is frozen and cannot attack/defend/use abilities for 2 turns.
Defense: 3
Flavor: "You'd make a cute snowman."

[watermonster]

Name: Radiance Armor
Cost: 6
Effect: If your hero is attacked, all your allies gain 1 bonus attack
Defense: 2
Flavor: "Don't touch me"

[followtheRain]

Freezing Shroud
cost:5
defense: 2
Your Opponents maximum hand size is set to 3.
"I can't feel my feet"

[AnAdolt]

Name: Snow Saphhire System
Cost: 5
Effect: 2 Shadow Energy: Glacier storm deals 2 damage to up to 2 targets
Defense: 1
Durability: 4
Flavour Text: "Give a cold shoulder they can't survive from."

Like Lost Time's and followtheRain's flavour texts.

[Lost Time]

Name: Snow Saphhire System
Cost: 5
Effect: 2 Shadow Energy: Glacier storm deals 2 damage to up to 2 targets
Defense: 1
Flavour Text: "Give a cold shoulder they can't survive from."

Like Lost Time's and followtheRain's flavour texts.

I'm confused... Glacier storm? is that another name suggestion for the card?

[NPD]

Name: Armor of the frozen Valkyrie
Cost: 6
Effect: (1) Your opponent can't play ability cards or activate card abilities until you next turn
Defense: 3
Flavor: Freeze

I think that all the heavy armor should has some sort of really strong effect. I've given this one a strong activated ability but I'm also assuming that armor that has been used doesn't prevent any damage. If that's not a rule that well be implemented then add that damage cant be prevented with this armor until your next turn onto that effect.