You need to understand how Poisoned is applied, which cards have this ability, how to cure it, and which decks exploit this effect in the current metagame
Although the profitable side of Pokmon cards is hard to ignore, there are still legions of fans who collect them for fun and use them for their intended purpose: battling with friends
Thankfully, considering the incredibly dense release calendar for MTG each year, this is a very good thing as it lets sets breathe
Other Oddities: Scroll through the Gruul page on EDHrec, and youll see all sorts of curiosities
The extra land part of the card wont always matter, since most of the time when you start using this ability youre probably not going to be in desperate need of more lands, but it could definitely help, especially in UG, which is a ramp color pair as it often is
They're so un-memorable that I had completely forgotten that they had been printed