Thunder Dragon is an enemy in Final Fantasy IV: The After Years. When encountered in not the final chapter, they are dangerous foes, but by the end of the game they should not pose too much of a threat and be easily defeated. It is highly recommended to inflict Slow or Stop on it if the player is underleveled, and if neither are options the player can use, then bringing equipment with resistance to Lightning-elemental attacks is highly advised, as its main means of offense is the powerful Lightning ability, which damages the entire party for a significant amount of HP. It will follow a strict pattern of Attack > Lightning, and then loop this pattern thereafter. Therefore, to prevent as much damage as possible, the player needs to defeat it before it takes its second turn in the battle.