Life Lose Gambling - Mortarion, Daemon Primarch

Hello there, gents.

I'd like to ask for help on how to build this Warhammer 40k commander, Mortarion, based on losing life, and token generation. As it is a very niche commander and my MTG knowledge is not as wide as most, it would mean a lot if anyone could help or at least suggest some cards to use and replace. Thank you in advance.