u/LlamaWaffles555

If I have something like [[Defiler of Instinct]] out so I can pay life, and something like [[Furnace of Rath]] or [[Solphim, Mayhem Dominus]] out that doubles damage to players, then do I pay 2 life and lose 2 life, or pay 2 life and lose 4 life because it was doubled?

Edit: Ignore Solphim, he doesn't do what I thought he did. Furnace of Rath is still a good example though.