Naaga Keys are among the most commonly used items for mid-level players, while Metins of Deceit are probably some of the least farmed metin stones. So, what about allowing players to obtain Naaga Keys from Crystal of Deceit? Of course, the drop chance should be considerably lower than the one from Kenki and Vizto — or alternatively, players could obtain Naaga Key Shards (4 shards for 1 key sounds reasonable). The drop rate should be low enough not to affect market prices too much, but high enough that players can still get one from time to time.
