The Power to Destroy is one of the five quests related to Ragefire Chasm in Classic World of Warcraft (WoW).
Your task is to find the Spells of Shadow and the Incantations from the Nether.
Here’s a walkthrough of The Power to Destroy in WoW Classic.
To unlock the quest, you can either have your teammates share it, or you can talk to Varimathras in the Undercity.
How to get the Incantations from the Nether and the Spells of Shadow
If I’m not mistaken, both items can be found from the Burning Blade mobs in Ragefire Chasm.
I can’t remember how I got the Spells of Shadow, but I received the incantations from the Burning Blade mob inside the dungeon.
Just do the dungeon until you get them both.
Bring the items to Varimathras in the Undercity
You can find Varimathras in the Apothecarium section of the Undercity, closer towards the end.
The exact location of the NPC is shown in the map below, marked by the player’s location.
Talk to him and you can choose one of three items as your reward.