The Blackfathom Deeps is a level 20-30 Leave there and continue swimming right, skip the next alcove you see and swim under the second. In that cave you will find Argent Guard Thaelrid, he will give you the quest Blackfathom Villainy. He is a gray-ish, wounded night elf lying face down on the ground. On a side note you can do these quests anytime as I did, they offer a great deal of Argent Dawn Rep. Now leave there and swim… wait for it… right, the next alcove is where you will continue on in the instance.

Follow the path until it comes to an intersection, straight ahead is the next boss, Gelihast. He is a level 24 Elite and is surrounded by levels 20-24 Elites. He is a dual-sword wielder, so make sure your tank has a shield and relatively high block/parry/dodge rating because of his devastating Attack Speed. Next to Gelihast is a table with a orb on it, click on it and you will receive a buff called Blessing of Blackfathom. From there take a left and in either the first or second cave on your left will be the next boss; Lorgus Jett. He is a level 24 Elite and will have level 22-24 Elites around him. He’s an easy caster that has shaman spells, but falls rather easily compared to a heavy-hitting melee mini-boss. (Note that he may appear in other parts of the instance, his spawn is random.) instance located in the northwestern corner of Ashenvale (14, 14).The doors will open and you can proceed on. Follow the path until you come to Aku’Mai. He/she is a level 24 Elite that is able to wipe out a tank who is not properly protected with gear and buffs and an unattentive healer. Poison effects whittle away at the tank’s health even more, but it should also be noted that fear and traps can be effectively used to buy time to heal.