Tergrid, God of Fright is a five mana Black 4/5 with menace
There are holes in his pelvis corresponding to the bones
Notice that our clock gets a counter every upkeep (both during your and your foes turns), so in a 4-person table you have about three rotations to make Midnight Clock tick
Sea-Dasher Octopus is fine for adding more redundancy and can play nicely alongside countermagic, giving you something to flash in when your opponent doesnt cast anything you wish to counter, but is definitely a bit clunky and expensive, and its painful to draw more than one copy of the Octopus early as a result
Dollmakers Shop // Porcelain Gallery Not many of the rooms from Duskmourn: House of Horror will be used in competitive Constructed decks, but Dollmaker's Shop should be considered the outlier
There are also many ways to blick/flicker this in white, and that could lead to some discussing plays