eXceptionally difficult letter, that X – #AtoZChallenge

Next to the letter Q,  X is an intimidating letter.

X is strong.
X crosses out.
X marks the spot.
X blocks entrances.
X crisscrosses threads that hold items together.
X adds hope through fingers and toes.
X begins Xe: a noble gas, an illuminating element.
X replaces Christ during winter holidays.

Why try to follow that? Y thinks it’s a good idea.

Wax unorthodox
soapbox mix.  Conflux transfix.
Redux?  Perplex?  Yes.