Evilara, Rakdos's Shadow

Evilara, Rakdos's Shadow enters the battlefield
with X +1/+1 counters on it, where X is the total
life lost by your opponents this turn.
{4}{b}{r}: Players can't gain life. At the beginning
of each player's upkeep, that player loses half
their life, rounded up.
"So much chaos, so much death. It's all just a show, a
great spectacle. They all have a role, and your's is a
sad one."