Suikoden[]
- "Thunder Rune can be used"
- —Item description
A Thunder crystal is a type of item in Suikoden. When a runemaster attaches a Thunder crystal to a character, it becomes a Thunder Rune, which allows the use of advanced lightning magic. It can be obtained from a treasure chest in Shasarazade (after defeating the Shell Venus).
Suikoden II[]
Dropped by Cockatrices in Rockaxe Castle or received from a knight in front of Gorudo's office in Rockaxe Castle (after liberation).