|Release date||21 November 2006 (Update)|
|High Alch||42 coins|
|Low Alch||28 coins|
|Store price||Not sold|
|Exchange price||3,034 coins (info)|
|There's a black warlock butterfly in here.|
A black warlock is a members-only item that players can use to boost another player's Strength level. To boost another player's Strength, simply use it on another player. This will temporarily raise the player's Strength level by 4 + 15% of their strength level (rounded down). Due to its use, player killing teams will often use them to boost each other's strength level, especially pures. Note the release option will free the butterfly so the butterfly jar can be used again, this will not have any effect on the releasing player.
Members can make this item by catching a black warlock using a butterfly net or a magic butterfly net whilst they have a butterfly jar in their inventory. They need level 45 Hunter to do so, and gain 54 experience points for every black warlock they catch.
They can be found in the southern to middle part of the Feldip Hunter area.