アイアンクラッド

• Type: Power
• Cost: 3
• Effect: At the start of your turn, gain 2 Strength.

Upgraded

• Cost: 3
• Effect: At the start of your turn, gain 3 Strength.

A Cost 3 Power that grants 2 Strength (3 upgraded) permanently every turn start. Strength stacks as turns pass, and late-game attack damage snowballs — a powerful scaling card. Cost 3 is heavy and limits actions on the cast turn, but early deployment yields massive long-term ROI. Strength rides every attack (Whirlwind, Dismantle, Trample), making it a universal Power worth considering in any deck. Shines in long fights.

Prioritize deploying as early as possible. After spending Cost 3 for one turn, the "+2 Strength per turn" benefit continues forever, so after 3 turns you've already stacked 6 Strength. Pre-secure Energy with Offering or Bloodletting so you can still act the turn you cast it. Paired with Whirlwind, Demon Form's turn-by-turn Strength compounds, making Whirlwind's total damage grow exponentially. In boss-scale long fights, 20+ Strength after 10 turns isn't rare.

• Whirlwind: X-cost AoE. Demon Form's compounding Strength drives huge late-game AoE.
• Inflame: Power granting 2-3 Strength immediately. Paired with Demon Form, locks in high Strength early.
• Bonfire Spirits: Turn-start Energy power. Supports paying Cost 3 Demon Form smoothly.
• Offering: HP-for-Energy + draw. Helps you play Demon Form early when drawn.
• Dismantle: Attack hitting twice against Weak enemies. With Demon Form's stacked Strength, double Dismantle hits for massive damage.

• Ironclad Strength Build (Key Card) (S-tier)
• Ironclad Whirlwind Energy Build (Key Card) (S-tier)
• Ironclad Primal Power Build (Key Card) (B-tier)
• Ironclad HP-Loss Build (A-tier)