To play a land means to put it onto the battlefield from the zone it's in (usually the hand)
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Mmmenon, the Right Hand Was Sensei's Divining Top anybody elses first thought upon seeing Mm'menon, the Right Hand
Here again, if you are looking to generate value by discarding stuff, you're almost certainly going to be better off discarding Voldaren Pariah, Prized Amalgam, or Haunted Dead, which makes it difficult to see a realistic role for aftermath in constructed
If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.) Legendary Creature - Pirate Monkey Rev, Tithe Extractor Whenever you attack, target creature gains deathtouch until end of turn