Medusa

Respawn time: 6h (At 01:15, 07:15, 13:15, 19:15)
If Medusa is not killed within 1 hour it despawns.

Reward:

1x Eterny Coin
Ruud Box (10000)
Ruud Box (15000)
Seal of Ghost Horse
2 - 5x Sculpture
10 - 20x Guardian Enhance
3 - 6x Guardian Elite Enhance
Mysterious Stone