Priceless Valkyrie

The deck is focused on keeping the cost curve as low as possible and making basic attacks boosted with Mean Swing, Skilled Strike, and Jarnbjorn.

During the early game, getting Jarnbjorn into play is your highest priority followed by your other weapons (with side holster) and then Bifrost and the rest of your support and upgrades.

Once you're built, you're going to be spending most of your hand attaching Death Glow to a minion, defeating that minion, and rinse and repeating. With Mean Swing and Skilled Strike, Valkyrie should be able to one shot any minion in play. If you don't need to boost the attack to take out a minion, then use those strength resources to reassign the damage with Jarnbjorn. The rest of your extra resources can be used to pull out Asgard Allies with Bifrost.

Only Defend as a last resort because you want to focus on going berserk making basic attacks on your turn, and don't attach Death Glow to the Villain unless you're planning on flipping down to Alter-Ego to cash in Hall of Heroes and/or Recover.