At six ink, this iteration of Ralph is a bit higher on your curve, though he does have a very nice ability to help justify it
It has been a powerhouse in both Modern and Legacy - so much so that it is actually banned in Modern now
The unique wordings associated with older poison cards versus newer infect cards determines the answer to this question: Poisonous creatures kill you with normal damage before the poison trigger has a chance to resolve while infect creatures dont
If you have questions or comments about the deck, Legacy, Vintage, or anything, Twitter is the best place to find me, but I also stream on Twitch
As a card themselves, Emrakul, the Promised End is an incredibly good time
Lots of aggressive decks enjoy a Boros Reckoner, and Nemesis goes harder and absolutely shuts down the incidental lifegain and its payoffs that many decks want