My take on the xenan clockroach deck using 2 lots of roach and giving any of them killer is really strong as a dark return or destiny trigger on the creature either gives you another copy or puts it back in the deck
The inclusion of witching hour is in there mainly for the memes and it has hour in its name fitting the theme but its inclusion is strong if not absolutely necessary.
i did originally have piercing grief in the 2 drop slot but its interaction between this unit and memory dredger did not work and wanted a blocker or unit in that slot that would potentially stick around.so opted for blistersting wasp instead - this is a flex slot but probably should still be a 1 or 2 cost unit