Upon entering the labyrinth, the hero, you, was greeted by a gate. The gate is next to a waterfall where the contents of one pool flow into the next pool.

The gate was still until your approach, and then it stirred. "You must tell me the answer to my riddle for which I gives three clues, each with a key to the clue. Putting all the clues together will give you another riddle and the answer of that riddle is what will open me."

Key of the swimmer with no bones

cryptic man wolf marble aftershock heater pressure appear tragic who gone authentic costumed proud object biology crook ferries luminous distribution monarchy excellent rare eerie burglary savior ceaseless pick distillery fertile bounces ambient song river private victory event haste deathtrap dust speed dead rum lost crypt hollowness

Key of the tile face

dream banquet sister going block alternate third bellyache attacking barren tool elegant gurgle babble of original several carbon demise juggling fantasy

Key of the marriage

crafty hotel hitchhiker you faint look breakable what bottomless do leaf you constant see barnyard

Hint:

Hint 2:

Taken from @Alconja’s answer below, don’t read if you want to solve the riddle yourself.

I apologize if this was too difficult, that is what I intended.