The Ark of the Covenant was deadly because God specified there had to be a mediator between His presence and men. That was the High Priest, allowed to face the ark once a year.
At the crucifiction of Jesus, the veil that separated humanity from God’s presence was ripped from top to bottom.
Now we are told that we have one mediator and one sacrifice, and that we no longer need sacrifices of animals to approach God.
There is no Ark of the New Covenant that kills men who dare come into God’s presence.
Amen!
Hoss