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card
defect
attack
uncommon
Rip and tear is a decent source of DPS in act one with the downside of having random targets. This downside doesn't matter at all in single target encounters. This card scales decently with strength. I would not pick any copies up after act one as they are too unreliable.

Vajra
common
At the start of each combat, gain 1 Strength.
A

Molten Egg
uncommon
Whenever you add an Attack card to your deck, it is Upgraded.
A-

Shuriken
uncommon
Every time you play 3 Attacks in a single turn, gain 1 Strength.
B

Sling of Courage
shop
Start each Elite combat with 2 Strength.
D+

Akabeko
common
Your first Attack each combat deals 8 additional damage.
C+
No defect, colorless or curse cards antisynergies.