Screaming Nemesis

If an effect says to set a player's life total to a number that's higher than their current life total while they're affected by Screaming Nemesis's last ability, their life total won't change.

Spells and abilities that cause a player affected by Screaming Nemesis's last ability to gain life still resolve. That player won't gain life, but any other effects of that spell or ability will happen.

Once Screaming Nemesis's last ability causes it to deal damage to a player, that player won't be able to gain life for the rest of the game. It doesn't matter if Screaming Nemesis remains on the battlefield or not.