spare spear
I got this idea from Super Dungeon Maker. One of its items, the Feather, allows the player to perform a dodge roll that allows them to bypass small holes.
Quest Master could benefit from it as well, but since there already is a Dodge Roll in the player's moveset, the item I'm suggesting can upgrade the roll by making it go faster/further and bypass holes. Though, holes that lead to lower floor can't be bypassed for anti-softlocking purposes.
lime sable
I don't see the point of this, tbh. Quest Master's own feather will give you the exact same result. There is no reason for an upgraded roll that goes over holes if the feather already does that for you with the jump
sturdy birch
While I do agree that the feather already fills this roll, it’s not entirely redundant since someone may want it for the same reason you may want to give the player regular bombs over remote, or boots rather than just making a platform appear over mud.