アイアンクラッド

• Type: Skill
• Cost: 0
• Effect: Transform every Attack in your hand into Boulder. [Boulder] Cost 1: Attack. Deal 16 damage.

Upgraded

• Cost: 0
• Effect: Transform every Attack in your hand into Boulder+. [Boulder+] Cost 1: Attack. Deal 20 damage.

A 0-cost skill that converts every Attack in hand into "Boulder (Cost 1, 16 damage)." Upgraded becomes Boulder+ (Cost 1, 20 damage). Attack-specific effects (Weak application, draw, etc.) are lost, but the cards normalize into high-raw-power Cost 1 attacks dealing 16-20. When your hand has many low-damage attacks (Strikes at 6 damage), Primal Power converts them at 0 cost, dramatically improving Energy efficiency. Especially powerful in attack-heavy decks that don't rely on attack-specific effects.

Play on turns where your hand is full of low-damage attacks to instantly convert them into high-power attacks. With 4 Strikes (6 damage each) in hand, Primal Power converts them into 4 Boulders (16 damage each), delivering 64 damage for the same 4 Energy instead of 24. With Inflame/Demon Form Strength stacked, each Boulder hits for 30-40+. Keeping Strikes in the deck (not removing them) amplifies Primal Power's conversion value. The upgraded 20-damage conversion is exceptional efficiency.

• Inflame / Demon Form: Strength buff powers. Boulder's 16-20 damage rides Strength for huge overall damage.
• Strike (starter copies): Keeping multiple Strikes in the deck gives Primal Power raw material to convert into Boulders.
• Battle Trance: 0-cost mass draw skill. Stuff your hand with attacks, then Primal Power to mass-produce Boulders.
• Bonfire Spirits: Turn-start Energy power. Provides the Energy to play multiple post-conversion Boulders.
• Setup Strike: Attack with this-turn Strength buff (play before conversion). Its buff rides the post-conversion Boulders.

• Ironclad Primal Power Build (Key Card) (B-tier)