Where is the Relic that the Lich ask to me in the Skull castle??

Pass a grate and down the stairs to another large area to explore. It's down there somewhere!
Wyv

I'm in a room with water and chained plateforms
There are 3 others ways: I've killed Fire Elemental (north)
And I think I've found Mada Mabby (west) but the door of her room is closed so I can't speak or kill her
Where is the scroll of banishing?

I've two dungeon keys and one key of bone

please help (I know it's hard to remember...)

The scroll is in a coffin in Mada Mabby's chamber.

The relic is in chest in the lava room with the collapsing walkway.

thank you proton

Fine. How do you open the damn door?? Nothing I've got seems to work on the stone face...

I'm getting desperate here. Help!