Warcraft 3 Frozen Throne Walkthrough for Night Elf Sentinels:
Chapter 3: The Tomb of Sargeras
Main Quest: The Search for Illidan
Head first through the northern door. Kill all the enemies to the east and find a rune of shielding in the crates. Use it, then head west. Fight your way through the skeletal orcs then kill the Necrolyte. You'll receive a potion of mana for your trouble. I recommend you drop the maul with +1 strength if you still have it. Make your decision, then go back out and to the east. Use Maiev's blink to cross and grab the tome of intelligence +2. She'll be at well over 600 mana now, allowing her to use her skills pretty liberally during this mission.
Head to the south and kill the Overlord you see to gain a mantle of intelligence +3. Even more mana! Work your way west through another overlord. You'll come to another series of halls. If you go south, there is a manual of health for Maiev. Though unnecessary, fight the pit lord.Head back to the intersection and go east this time, where you'll find a fel hound in a room with a statue of a huntress.
Optional Quests: The Shadow Orb and Barriers
There are two staircases here. First look for the rune along the southern wall with Maiev. Blink up there, then follow the path and kill the skeletons to reach the first shadow orb fragment. Go back to your army. Destroy the rock barrier to the south to get some extra units in the form of two druids of the claw. Teleport across the boulders here to get a second shadow orb fragment. Step on the floor plates to the northeast and a door will open. Head back to the west. through the now open door to fight a slime hurler. He drops a ring of protection +2, which you may or may not want to use. I substituted it for the mantle of intelligence +3. More importantly, you can teleport across here to get a third shadow orb fragment.
Head back to where you stepped on the glowing floor plates and push to the north onto a bridge. You'll fight a small skirmish here. There is another rune you can see on a ledge on the western side of this bridge. Blink there to grab the fourth shadow orb fragment. Already this thing increases attack by 4 and grants 1 extra armor. You'll thank yourself later if you've bothered getting them thus far.
Go back to your squad and press on to the north, where you'll watch a cutscene. Continue on the path and use the druids for healing as you go. You'll eventually come to hydras. as the path snakes toward the northwestern corner of the map. Destroy the set of boulders here to get a pair of dryads to join your group. If you go to the south you can find a rune of mana to help you out. The hydra hatchlings in the northwest aren't needed, but if you look near the northern ramp there is a tree. Use a huntress to send an owl to the tree and you'll see a rune to the east on a ledge. blink yet again to grab the fifth shadow orb fragment. Up the northern ramp you'll face a gargantuan sea turtle, guarding another rune of mana (southwest of him)on a ledge, and the sixth shadow orb fragment in a crate.
Go back down the ramp and head to the east. You'll fight more hydras. There will be a tree along the northern wall, where you can place a second owl to find another ledge with the seventh shadow orb fragment, bringing the artifact to seven damage and 2 armor. Head further east and your army will eventually come to a stream you cannot cross with your entire army. Blink across it with Maiev and step on the glowing floor section. A bridge will form, allowing your troops passage. Continue down the path to the east and watch a cutscene with Lady Vashj, then mow down the Naga.
You'll be back into the tomb's halls through the passage to the east. Destroy the boulders to let in a pair of druids of the talon, then take Maiev north. Blink down to the flooded floor and fight a level six hydra. To the west of him is another rune of mana and the eighth shadow orb fragment. This thing is getting really powerful at this point.
Take the southern passage and destroy the Naga along the way. There are plenty of healing runes in this hall, and you will be seeing more mana runes so use Maiev's skills as often as you can. When you reach the second gate, there will be a rune to the north of it. Before you break the gate, blink up there and follow the path to find two mana runes along a route, with the ninth shadow orb fragment.
Destroy the gate and head immediately south with Maiev. You'll see the last beacon rune to reach the tenth shadow orb fragment. The artifact is now really powerful with +10 attack, 3 armor and enhanced hit point regeneration.
Head on to the east with your army. The final cutscene has Illidan bringing the cave down around you. Getting out with Maiev is easy, just keep in mind three things: