Destroy them, then you can Special Summon a number of "Doom King" monsters from your Deck and/or Extra Deck, up to the number of destroyed cards
Personally, its made me think a lot about making a dedicated The Mummy (2017) MTG Commander Deck, with a stand-in for Ahmanet as a Commander for a horde of Zombie-type Mummy creatures
It's even implied (and presumed in-universe) that it wants for expedition to discover it, and everything, starting from the crash, was orchestrated for that end
While you can win a counterwar to protect spells on the stack, you can also get a two-for-one by redirecting a removal spell away from one of your creatures to one of your opponent's
In reality, it is busy absorbing starlight and dust as it prepares to evolve
The manifest synergy is just too tempting