Find the word(s) and context(s) which satisfy the following conditions. Note: some of the conditions cannot be met with ease!
One of us ascends, prior to expulsion.
Two of us concealed you before.
One of us, with a preposition, makes a fearsome monster.
Two of us make a garment nobody can get himself out of.
If you trade two of us for one of us, you go from beyond ugly to beyond beautiful!
Jason C requested a clarification of the rules. So, "word" means a word in English. "Context" may refer to a series of letters that changes one word into another. For instance, if "laughter" is a word, and "s" is a context, then the clue might be "mayhem" (slaughter).
Think of "one" and "two" not as quantities, but as indices.