First, show the guard at the gate to the Death Mountain Trail Zelda’s Letter. He will ask you for a Keaton Mask. This begins the trading sequence with the mask merchant in Hyrule Castle Town. Settle the payment for each mask sold to the merchant before renting the next one.
1. Keaton Mask
Borrow the Keaton Mask in Hyrule Castle Town and return it to the guard at the Death Mountain Trail gate. He will pay 15 Rupees . Return to the mask vendor and pay the required ten Rupees back. You can keep the remaining five. After that, you can borrow the Skull Mask .
2. Skull Mask
After the Diving Game, use the shortcut from Zora River to the Lost Woods . First take the Skull Mask to the Forest Stage in the Lost Woods and collect the Deku Stick capacity upgrade. Sell the mask afterward. Turn left from the forest entrance, play Saria’s Song for the Skull Kid to receive a Piece of Heart, and then show him the mask. He pays 10 Rupees , although you owe the shopkeeper 20 Rupees . Bring an extra 10 Rupees to settle the bill.
3. Spooky Mask
Rent the Spooky Mask for 30 Rupees . Visit the Kakariko Village Graveyard during the day and show it to the boy imitating Dampé there. He will pay 30 Rupees. Exchange the mask in Hyrule Castle Town.
4. Bunny Hood
The Bunny Hood cost 50 Rupees from the merchant. Once you have all three Spiritual Stones, you will find the runner on his rounds around Lon Lon Ranch. Follow him and wait until evening when he sits down. Speak to him while wearing the Bunny Hood. He will pay 200 Rupees. Return to the mask merchant and pay the 50 Rupees.
5. Mask of Truth
After settling accounts with Bunny Hood, you can borrow the Mask of Truth . With it, you’ll understand the Gossip Stones in Hyrule . Also, take it to the Forest Stage: The Deku Scrubs there will give you the second upgrade for Deku Nuts.
6. Goron Mask
After the four sales, you can also borrow the Goron Mask. Wear it when talking to villagers to see their reactions. No additional Buyer is needed for the mask exchange sequence.
7. Zora Mask
The Zora Mask is also available after completing the sales sequence. You can borrow it from the merchant and use it to talk to villagers.
8. Gerudo Mask
The Gerudo Mask is also among the masks you can borrow after completing the trading sequence. You can find more paths and suitable detours in the early collection route .