If you go with the Mardu side, and you had a creature die under your control on your turn, you get to make all your opponents sacrifice a creature of their choice, whittling down the board but having a decidedly smaller impact than the Abzan side
Legendary Creature Avatar Horror WardSacrifice a legendary artifact or legendary creature
The Dalmatian puppies introduced in this deck offer some delightful new play options, including the opportunity to add 99 copies of Tail Wagger to your deck (you'll need to buy 94 extra copies if you want to make it happen, though)
From a game mechanics sense, this means the end of Investigate from the first set, as the mystery is solved, and the addition of several new mechanics Emerge, Meld, and Escalate to represent things going from bad to worse
While Mesa Enchantress may be the weakest of the bunch, any of these three cards are perfect for keeping your hand stocked with gas while strengthening your board
If the target creature is already tapped as Tranquilize resolves, you will still put three stun counters on it