To collect keys to enter the stronghold in Hail to the King in Dwarves Favour when you get to the locked door go down the right path first. When you get to the locked door with runes on it pick up a pink spiky ball from the trunk near the door and throw it at top of the left gong:
Use a lightning arrow to explode it and another arrow to explode the pink spikes near the right gong. Make your way through the gate and follow the path. Use the axe to lower the bridge and keep following the path:
Pick up the key off the podium and return to the locked door.
This time follow the left path until you get get to a locked door with a winds of hell sphere in it. Drop down and throw the axe at the white disc below the wheel on the cliff:
Go back below the locked winds of hel door and pick up the crystal when it arrives. Carry the crystal to the area below where you crept across the ledge before and place it into the socket. Use an ice arrow to activate the bridge:
Go back around to the pillar with the winds of hel:
Take the winds of hel and make your way up the slope and across the bridge and put the winds of hel into the pillar ahead. Go past the pillar, take the winds again and transfer them to the locked door. Follow the path and collect the last key.
To find the gold, silver and bronze key in The Hundred Hands of Chaos in South Park: The Fractured But Whole go to the front door and open your time controls. Use the pause time ability to walk across the electrified water and pick up the silver key:
Then go under the stairs and open investigation mode and use Snap N Pops to get the golden key:
Then go into the kitchen and pick up the bronze key. To escape your house go to the front door and use the keys. Then enter inspection mode and use Snap and Pops on the chain and lock at the top of the door: