Soh'sem, Nauseating Chef

Savor 3 (When this creature enters the battlefield, you may pay up to 3 life.)
At the beginning of your upkeep, each opponent creates X black 0/1 Food creature tokens, where X is the amount of life you savored.
At the beginning of each player's end step, that player loses X life, where X is half the number of creatures they control, rounded up.