Atraxa comes with four keywords, one from each color she represents, and an end-step trigger to proliferate or add an additional counter to each permanent and player for each counter they already have
Either way, these lands are always a great pick up and will see play outside of Standard once Zendikar Rising rotates
It works with everything from cards that were in Standard at the time of printing (Living Death, Recurring Nightmare) to strategies recently printed (Boneyard Wurm, Spider Spawning) and everything in between
Suppose something is dominating the board, like a nasty Stasis, that you need to destroy
(Then planeswalk away from this phenomenon.) The Night of the Living Dead Phenomenon When you encounter The Night of the Living Dead, each player exiles all creature cards from his or her graveyard, then sacrifices all creatures he or she controls, then puts all cards he or she exiled this way onto the battlefield