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card
colorless
attack
uncommon
Fares well early, particularly in Ironclad who does not have many 0-energy cards nor ways to gain energy, but in the late game you might find yourself not being able to spend all your energy each turn with too low-cost cards. As a freebie, it's ok, but rarely worth spending money on except in an emergency.

Kunai
uncommon
Every time you play 3 Attacks in a single turn, gain 1 Dexterity.
C+
S-
C+
B-

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

Ornamental Fan
uncommon
Every time you play 3 Attacks in a single turn, gain 4 Block.
C-
C+
D+
C-

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

Unceasing Top
rare
Whenever you have no cards in hand during your turn, draw a card.
D-
B-
C-
B-

Nunchaku
rare
Every time you play 10 Attacks, gain 1 Energy.
B-
B+
B-
B

Strike Dummy
uncommon
Cards containing "Strike" deal 3 additional damage.
D+
D
D
D