Frost

power

Defragment

1

B+

Gain 1 Focus.

power

Capacitor

1

B-

Gain 2 Orb slots.

skill

Glacier

2

B+

Gain 7 Block.
Channel 2 Frost.

skill

Chill

0

A-

Channel 1 Frost for each enemy in combat.
Exhaust.

skill

Coolheaded

1

A-

Channel 1 Frost.
Draw 1 card.

Calipers

rare

At the start of your turn, lose 15 Block rather than all of your Block.

D

C+

B-

C-

Frost orbs provide so much block that they can solve your defence entirely. Make sure to have extra orbs and focus to take your block per turn from 6 up to 54 with just two Defragments and two Capacitors. This leaves you with so much energy spare to focus entirely on damage once you are set up.

The Frost-generating cards have a good amount of utility and are strong in their own right: Glacier provides the most block in a single card, Chill is very useful for early defence while you scale, and Coolheaded helps you cycle to your powers.

Calipers is absurdly good for being able to maintain the huge amounts of block you can rack up each turn, easily letting you reach the cap of 999 Block.

attack

Cold Snap

1

B-

Deal 6 damage.
Channel 1 Frost.

skill

Chaos

1

C-

Channel 1 random Orb.

skill

Rainbow

2

B-

Channel 1 Lightning, 1 Frost, and 1 Dark.
Exhaust.

attack

Barrage

1

B-

Deal 4 damage for each Channeled Orb.

attack

Streamline

2

A-

Deal 15 damage.
Reduce this card's cost by 1 this combat.

attack

Rip and Tear

1

B-

Deal 7 damage to a random enemy 2 times.

skill

Zap

1

C-

Channel 1 Lightning.

skill

Dualcast

1

B-

Evoke your next Orb 2 times.

attack

Ball Lightning

1

C+

Deal 7 damage.
Channel 1 Lightning.

attack

Sweeping Beam

1

C

Deal 6 damage to ALL enemies.
Draw 1 card.

Frozen Core

boss

Replaces Cracked Core. If you end your turn with empty Orb slots, channel 1 Frost.

A-

Orichalcum

common

If you end your turn without Block, gain 6 Block.

A+

B

A

B

There are a couple more sources of Frost. Cold Snap is great against all Act 1 Elites (generating defence against Gremlin Nob without giving him Strength, giving Block ignoring Dexterity Down in Lagavulin, and helping you tank damage on bad turns in the Sentries fight). Chaos has the chance to generate Frost, and Rainbow generates a bunch of Orbs including Frost - these cards are fine if you have enough sources of Frost to generate new orbs, otherwise you may leave yourself open to damage while you scurry to patch the hole in your defenses that they create.

Frozen Core is a solid pick in this deck, helping set you up faster, putting less onus on Frost generation and more on Focus and Orb Slots. Dualcast and Multi-Cast can be used and Frozen Core will replace the missing orb, letting you Evoke more frequently.

Orichalcum does work with Frost Orbs and can help generate even more end-of-turn Block, particularly useful while you set up.

As much as this deck's defining feature is its defence, you still need offense to finish combats. The simplest way is to sprinkle in some Lightning or Dark orb generation if it's safe to do so, especially if you have Focus. Failing that, pick up some simple attacks like Barrage, Streamline, Sweeping Beam or Rip and Tear instead.