Apocalyptic
/əˈpɒ.kə.lɪp.tɪk/
noun
One who predicts apocalypse.
Synonyms: apocalypticist, doomsayer
adjective
Of or relating to an apocalypse:
Portending a future apocalypse (disaster, devastation, or doom).
Eggcorn of apoplectic.
“He was apocalyptically furious.”