Rampaging Ferocidon
Menace
While this creature is on the battlefield your opponent can’t gain life.
The main function of this card seems to work (sort of)… any life gain is reduced to zero (it displays a green +0 by the opponent’s profile). However, secondary effects triggered by life gain (e.g. Ajani’s Pridemate: Whenever you gain life, this creature gets +1/+1) still appear to trigger.
I think the problem is that the ‘life gain’ actually happens in game even though it’s reduced to zero, so effects that trigger upon life gain still work. Seems like a bug to me, as Rampaging Ferocidon specifically prevents opponent from gaining life, therefore life gain shouldn’t even trigger.
I’ll leave this to you guys to decide if that’s a bug or working as intended.
//Edited Title -Brigby