Phistophilus, Contract Keeper

Players cannot lose the game.
Whenever an opponent pays life, you gain
that much life, then put a +1/+1 counter on
Phistophilus, Contract Keeper.
{p/c}{p/c}{p/c}: Phistophilus, Contract Keeper gains
Indestructible until end of turn, then, any player
may pay 4 life, if they do, they draw a card. Any
player may activate this ability.