Black warlock

Black warlocks can be caught at 65 Hunter when you wield a butterfly net and have an empty Butterfly jar, yielding 1062 Hunter experience. For catching Black warlocks barehanded (but still with an empty jar) you need 95 Hunter, this will grant you 2205 Hunter experience. You can find Black warlocks in the jungle of Karamja.

You can release caught Black warlocks to get an empty jar again. Doing this also grants a combat boost to other players in multi-combat areas. Releasing a Black warlock will increase Strength level by 15% plus 5.