Card not found (New Phyrexia (2011)) smells like MaRo, because its actually a pretty good wincon in a limited Infect deck
As I mentioned before, things are more complicated than this when you consider cantrips, card advantage, and such, but this should give you a good start for making sure you have the right number of lands in your deck
So that meant Robin Hood - Capable Fighter, Beast - Forbidding Recluse and Hans - Thirteenth in Line make for great inclusions to the list
The Lord of Pain deals damage equal to that spell's mana value to the chosen player
310.4b A battle has the intrinsic ability This permanent enters the battlefield with a number of defense counters on it equal to its printed defense number. This ability creates a replacement effect (see rule 614.1c)
As long as you aren't compromising your deck too much in doing so, this can be a winning strategy