Rampaging Ferocidon

Rampaging Ferocidon's last ability triggers whenever any player has a creature enter the battlefield, including you.

If an effect says to set a player's life total to a number that's higher than the player's current life total while Rampaging Ferocidon is on the battlefield, the player's life total doesn't change.

Spells and abilities that cause players to gain life still resolve while Rampaging Ferocidon is on the battlefield. No player will gain life, but any other effects of that spell or ability will happen.