On Borrowed Wings

• Battleship Power Core (3)
• Power Core replenished (0/100%)

• say

You will receive:

• +75 reputation with Armies of Legionfall

• say

Kill Wyrmtongue Engineers until you get the power cores. You can attack Legion Cannons to make them explode and one-shot engineers that you've tapped by them, but will also stun you if close enough.

On the southeast side of the tomb, there are Fel Energy Globes in the air; just fly through them to get 10% completion each. If that doesn't work, the most reliable method is to hover above them.