OldSchoolKO boss locations and respawn times: Eslant, Colony Zone and Isiloon drops
On OldSchoolKO the Eslant bosses respawn every 4 to 8 hours and most Colony Zone bosses every 3 to 6 hours. The strongest accessory boss is Isiloon in Hell Abyss.
Knight Online PvP
Items and drops
OldSchoolKO upgrade rates, boss locations, respawn times and drops.
OldSchoolKO upgrade rates: BUS, Trina's Piece, REB and accessory tables
On OldSchoolKO a BUS has a 1% chance from +7 to +8, or 2% with Trina's Piece. REB reverse steps are 20% each, 40% with Shadow Piece; +9 on normal items and reverse +6 are closed.