Consumable items are single-use items that can heal, restore MP, or inflict/cure status effects. Potions, Ethers, Phoenix Downs, and Antidotes are standard examples. While White Mages and Chemists can provide similar effects, having a stock of consumables is crucial for emergencies or when your healers are incapacitated. Remember that using items in battle consumes a turn. Stock up on essential items before challenging missions. They can be purchased from shops or found as drops from defeated enemies.
