Others need to ramp really, really hard, like my Vaevictis Asmadi, the Dire deck, which runs 40 Lands and 20 ramp spells, for a total of 60 mana sources
Arcum requires a bit of setup, but once its protected and online, your combo pieces basically materialize out of nowhere
Creatures with this ability don't grant poison counters but they wither them away when they deal damage to another creature, adding -1/-1 counters instead of dealing damage
Heck, Im not playing Death Baron because of its price tag and the fact that I dont think its very relevant to the deck
TURBULENT FEN I mentioned Jund a moment ago, and for good reason Jund Landfall is the flavor of the week right now (or maybe month, or even year)
Pretty much none