ob nixilis

[rawsugar]

ob nixilis was set to make opponent lose life rather than target player, i believe this is more correct:
[card]
name=Ob Nixilis, the Fallen
auto=@movedTo(land|myBattlefield):may counter(1/1,3) && life:-3 target(player)
text=Landfall - Whenever a land enters the battlefield under your control, you may have target player lose 3 life. If you do, put three +1/+1 counters on Ob Nixilis, the Fallen.
mana={3}{B}{B}
type=Legendary Creature
subtype=Demon
power=3
toughness=3
[/card]

technically it should be -3 target player & counter, since it doesnt get counter unless it can actually target, but not proficient enough to know exactly how that would look. Still this is an improvement