Question: dark souls 1 how to enter dlc?
Answer: Go to Darkroot Basin, beyond the waterfall will be a cave with a Golden Golem. ... 
Go to Duke's Archives, head up the elevator and kill the Crystal Golem for a Broken Pendant.
Head back to where you freed Dusk of Oolacile in Darkroot Basin. ... 
From here, you will be teleported to Sanctuary Garden.