Here's how to unlock and use Lethal Flame:
1. Complete the game once. This is the crucial prerequisite. You need to have finished the main storyline of Chain of Memories.
2. Start a new game on Proud mode. Lethal Flame only becomes available on this difficulty setting.
3. Obtain the Fire element. You need to be able to use fire-based spells. You can achieve this by collecting Fire cards throughout the game.
4. Equip the Fire element card. Equip a fire card (like Fira or Firaga) to your deck.
5. Build your deck. You'll need to have a deck that allows you to effectively use fire spells. This might involve cards like:
* Reflect: To reflect attacks and build your card points.
* Draw: To replenish your hand.
* Support cards: To boost your attack power.
6. Perform a combo attack. When you have a card that allows you to perform a combo attack, use it alongside your equipped fire card.
7. Trigger Lethal Flame. If you meet the criteria for a combo attack and have the Fire element equipped, Sora will unleash Lethal Flame, a powerful fire-based attack.
Important notes:
* The appearance of Lethal Flame is random. It doesn't always trigger even with the right conditions.
* It requires a lot of practice and strategy. Mastering the timing and card management is essential for successfully using Lethal Flame.
Good luck!