If that hideous day ever happens, that beer would be an Andechs' Brewery Bergbock Hell [1]. Why? Hard to tell, personal favourite. I find bockbier types the most tasty, smooth and at the same time strong beers.

[1] https://www.andechs.de/en/monastery-brewery/product-range/bergbock-hell.html

If these gems were not available for me, I would also be happy drowned in belgian Kaiser Karel, american Spencer Trappist Ale or german Hofbräuhaus.