Open the Gates of Warfang
The objective is to open the gates to pass this level. To open them you need to place the four crystal keys hidden throughout the level in the dragon statues sat in front of the gate. It is possible to go for keys 3 and 4 before 1 or 2 but it is easiest to follow the order here.
Crystal Key 1
Turn right and fly across the gap. Low down on a platform there is a spirit gem, you can see it shining through the fog. Smash this and then fly back up to the platform above. A small cutscene will show Spyro and Cynder looking at a carving of Malefor on the wall. Note the location of the adamantite orb as you will need this later. Go along to the end of the platform and turn the wheel to lower a moveable wooden platform. Halfway during turning the wheeel you will be ambushed by skeletons. Dispatch them all and then complete turning the wheel to lower the platform. Fly out to it and have one dragon grab onto it, and then the other pull it back using the magic chain. It works in the same way as the boat did in the Valley of Avalar. Use the platform to cross the gap.
About halfway across a skeleton will come out and pull a lever lowering a barrier blocking the way. Fly across to the right and then up to the higher area. There is a wheel that lowers the wooden blockade, but when you begin to turn it you will be attacked by skeletons. Wipe them all out and finish turning the wheel to clear the way, then head back down and go back to the platform. Drag it along to the other end and leave the platform here. More skeletons burst out the holes in the wall. Flame the vines to find a red crystal upgrade. At the end of this area there are a pair of tuning forks. Use Cynder's fear breath to activate them, this sends out have of the bridge. Fly across the river and activate the second set of tuning forks on the other side to fully extend the bridge.
Now that the way is clear go back and fetch an adamantite orb from the beginning of this area. Bring it all the way back to this point and place it on the switch. This lowers the wall and reveals the first crystal key. As soon as this happens a troll will emerge from the fire at the side and steal the key. Kill the troll and take back the key and a wind tunnel will open. this leads back to the start of the lavel and the dragon statues.