Anirone

At first : whenever the game lets you the choice between using the sword or the hammer and doing something else, always choose the second option. For example, always burn the plants (you'll have to answer "no" when the game will ask you if you want to smash/cut the plants). Additionally, don't forget to always light the lamp after having burnt something.

1) The beginning of the guide is right. Let's just point out that you MUST use the hammer to break the jar which contains the sack or the one that contains the bomb.

2) After returning to the real world, take the flower vase and interact with the door. Not having the hammer anymore is crucial because you will be forced to break the door if you still have it. If you lost many HP during the bat battle, heal yourself by sleeping in the bed.

3) Since you can't open the room, the man will come in. Choose to use the vase and beat him.

4) Get the right door key in the north wing.

5) Now, we have to get the second key to the fantasy, which is in the fireplace in Anirone's room. Fill the sack with water. Since the man is sitting before the door, you have to go to the fantasy world and teleport into your room. Pour the water into the fireplace to get the key. If you forgot to light your lamp before pouring, you can light the fire again by using the stick and the curtain (north wing).

6) Get the padlock key in the eastern wing and return to the main hall. You'll encounter the man. If you don't have the sword anymore (it will happen if you used the hammer to do something else than smashing a jar), you'll get a bad ending. If you still have it, threaten the man with it then give one of your keys to the fantasy to him.

7) At this point, I greatly recommend you to get potions. Go back to the fantasy world, cut one of the two jars containing potions with the sword. The potions stock seems infinite ; better take tons of it ! (He're how I used the sword a second time)

8) Follow the man in the fantasy world. You'll have to solve three tough enigmas. Be sure to remember everything you did !

9) First battle against the ghost : Anirone's attacks deal no damage to him.

10) Change the character.

11) Second battle and third battle against the ghost.

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I don't know if it's intentional, but the only one way I found was sending the lit lamp to the ghost during the first turn, then surviving six turns (guard and use potions). If I don't send the lamp during the first turn, the combat is infinite.

The only one way of dealing damages is using the spell "Holy weapon" before attacking. You have to hit him three times. He isn't really threatening but don't forget if one of your characters dies, it's game over !

The ghost will keep stunning, blinding, sending you to sleep, silencing and confusing you, reducing your physical and magic defense and increasing his attack and magic power. Just defend your team : increase your defense, use potions, and wait for him to run out of mana. Once he's out of mana, you can cast Holy weapon and attack him. Be sure to keep a high mana pool thanks to the mana regeneration spell : the ghost can drain your mana and, if you can't nor cast Holy weapon neither regenerate your mana, you can't deal damages anymore ! It's very long, but there is no other way...

If you break the door with the hammer, you won't be able to get potions. Potions aren't as essential as the sack and the bomb, but I don't think you can beat the ghost without them, unless you're EXTRAORDINARY lucky.

the bat chased me all the way to the first room.

the bat that attacked you as soon as you enter the room with the three switches. I ran back to the first room and got stuck there.