王の勇気

王の勇気 is a ポーション（アンコモン） potion in the regent pool.

Common potions cost roughly 48–53 gold at the merchant, Uncommon 71–79 gold, and Rare 95–105 gold (per-rarity variance ±5%). Potions can also drop from combat rewards based on the per-fight potion drop chance (about 40% base, trending toward 50%, with a +25% bonus in elite fights and a ±10% pity adjustment after each fight).

王の勇気 can be saved between combats and used at any point during your turn. Effects trigger immediately and the potion is consumed.