Also, during this phase, a player may choose to play a card from his or her hand by tapping lands to produce mana
If Possessed Skaab would die, exile it instead.) from Origins
Play Megrim next as well as one of your draw/discard creatures such as the Cephalid Broker or Lore Broker or your force discard/draw creatures such as Barbed Shocker or Abyssal Specter (there are many other Specter creatures that will work as well)
It has vigilance, allowing Wan Shi Tong to play both offense and defense
Running it alongside The Reaver Cleaver and Beamtown Beatstick et al is of course going to fuel it reliably, but there wont be a game where this doesnt trigger multiple times a turn cycle
Though my opponent pulled two Hymns and I snagged three Thallids (and backdrafted the super-annoying Goblin War Drums), neither of us landed a potentially game-changing Hand of Justice or a Goblin Grenade, creature factories like Breeding Pit or Goblin Warrens or Night Soil, or big boppers like Feral Thallid or Deep Spawn (I had to look that one up, but it's actually not that bad)