Alles Oder Nix

You and target players each roll a six sided die.
If your result is the highest, deal twice the result
to target opponent. Else, you lose life equal to the highest result. If you rolled the same result, you
may cast Alles Oder Nix without paying for its
mana cost. If you do, replace any instances of
"six" with "ten".
"Egal was du tust Bruder, denk zweimal"
— Xatar, Baba Aller Babas