アイアンクラッド

A Cost 1 attack costing 2 HP and dealing 15 damage (20 upgraded). Exceptional damage for 1 Energy, with 20 damage upgraded among the best 1-cost attacks. The 2 HP cost is risky, but combined with Blood for Blood (bonus hit on HP loss) or Blood Boil (Strength on HP loss), the loss converts directly to advantage. Essential in HP-loss builds where multiple Hemokinesis + Blood Cloak maximize damage efficiency. Cost-efficient as pure damage too.

Use actively when HP-loss synergies (Blood for Blood, Blood Boil) are online. Combined with Blood for Blood, Hemokinesis's HP cost fulfills the bonus hit condition every play. With Blood Boil, you gain Strength too, so Hemokinesis alone yields "damage + bonus hit + Strength". Use aggressively early while HP is high to burst down tough bosses. Always maintain stable Block to control HP-loss risk.

• Blood for Blood: 0-cost attack with bonus hit on HP loss. Hemokinesis's HP cost triggers the condition.
• Blood Boil: Power granting Strength per HP loss. Hemokinesis's HP cost becomes a Strength buff that also scales the attack.
• Blood Cloak: Power giving Block per HP loss at turn start. Central pillar of HP-loss builds with Hemokinesis.
• Bloodletting: HP-for-Energy skill. Same-turn Bloodletting + Hemokinesis concentrates huge resources.
• Predator: Exude attack increasing max HP on kill. Offsets max HP attrition from HP loss.

• Ironclad HP Sacrifice Build (A Tier)