I already have it on my main account. I don't need the second account because I wouldn't use it anyway, so why waste it? Let it be useful to someone. :)

DLC
https://store.steampowered.com/app/1471870/Mortal_Kombat_11_Ultimate_AddOn_Bundle/
for game
https://store.steampowered.com/app/976310/Mortal_Kombat11/

I will not send the key without checking the winner has this DLC and base game.