Planning the Assault
Planning the Assault is a quest for level 45. It is step 31 of 35 in the Balance of Power storyline. The quest's turn-in marker is in Suramar at 37.8, 47.4. It rewards 775 experience and money.
Description
Thanks to your tireless efforts the Heart of Zin-Azshari is ready to withstand the full power of the Legion. The final destination in our journey has stood defiantly in front of us from the moment we began - the Nighthold, now home to none other than Gul'dan himself.
We just need a way inside.
I am working fervently with the rest of the Council of Six to secure an entrance. Once we have, we should reunite with the Moon Guard in Shal'Aran - we still have need of their skills.

