Find drop and spoil sources for Maestro's Key in Lineage 2 High Five. Compare the recorded quantities and chances, then open a monster's page for its location and stats.
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Maestro's Key
Can open Treasure Chests between level 21-85 with 100% chance. When a character below level 77 uses it on a treasure chest that is more than 6 levels above, or when a character above level 78 uses it on a treasure chest that is more than 5 levels above, the key disappears but the reward cannot be obtained.