The Catacombs (Normal Mode)
Red Cave 1
If you didn't rid yourself of the banshee curse earlier, the banshee will now give up on you and go away. Go through the left entrance.
Red Shaft 1
Go through the right entrance.
Den
Try to Go forward and you'll be accosted by twin gargoyles! They're pushovers in this mode, and easily spooked. You can Use Flumoris to startle them, or Use your Dirk to frighten them off. Go through the center entrance.
Red Tunnel 1
Open the Threadbare Sack on the ground to find the Timeworn Scroll, Tablet, Black Crystal, and White Crystal. The Timeworn Scroll is some lore, and mentions the fact that there are some easter eggs from the original Shadowgate game down here. Only one of which you can find in Normal mode, and I'm skipping past it with my directions here so you won't come across it unless you explore on your own. To continue on with the quest, Go through the right entrance.
Red Cave 2
Go down the ladder.
Red Shaft 2
Go through the entrance.
Rendezvous
Go through the right entrance
Red Cavern 3
Go through the only entrance in here.
Red Shaft 3
Go up the ladder.
Red Shaft 4
Go through the passage.
Red Cave 3
Go through the passage. Normal Mode is a very exciting time to be in the Catacombs.
Red Mine
Go through the passage.
Red Tunnel 2
Go through the right passage.
Chasm
There's a small rock pillar just before the chasm proper, Go to that stone to reach the Crystal Puzzle.
Rock Table
This puzzle is mostly solved for you in Normal Mode. If you think back to the mural in the Ornate Chamber, you'll see that the rows of red and blue crystals align with the same colored peaks depicted in the mural. You just need to line up the White and Black Crystals. Place the White Crystal in the third hole from the right in the second row down, and the Black Crystal in the third hole from the right in the top row. Use the Crysalys spell on the Rock Table to complete the puzzle.
Chasm
A fancy bridge of light appears across the chasm, which is something I really Dig. Go across it and through the doorway on the other side.
Yellow Cavern
Go through the passage.
Yellow Cave
Go through the passage.
Yellow Tunnel
Go through the passage.
Skull Door
Use the Invokan spell on the obelisk to summon Lakmir for a final time. He reveals that the Staff of Ages requires an empowerment involving a great sacrifice in order to be fully formed. Use the Silver Orb on Lakmir to capture his spirit within. Use the Stave with the Golden Thorn, then Use that combo on the Silver Orb to create the Staff of Ages. Note that the Silver Orb won't combine with the Stave unless you've first captured Lakmir's power.
Now we just need to open up the door. If you looked at the Tablet you picked up earlier, you'll see that it has a picture of a hand, something that looks like the Bladed Sun, and then four vertical lines. Following those directions, Use the Bladed Sun on the recess located on the ring finger (fourth finger across from the left), then Use the Platinum Horn on Thyself. Assuming the Bladed Sun was properly placed, the door will open and allow you to Go through to the final battle.
Summoning Chamber
The great Behemoth has already been summoned. Are we too late?! The Warlock Lord will summon three glowing orbs that circle him. In order to end Talimar's evil machinations, Use the Staff of Ages on any one of the three orbs to break his spell.
Now just Enjoy the ending!