With the mass of new Zombie cards featured in Amonkhet, many players are seeking out any other cards that might synergize well with the powerful new Zombies. One card that has come to mind is a Zombie-themed sorcery card from Shadows Over Innistrad, From Under the Floorboards.
From a raw power standpoint, these two cards are extremely similar. From Under the Floorboards puts three 2/2 Zombie tokens into play. This is the same 6 power that Liliana's Mastery offers, but spread among three creatures instead of two. However, those tokens come into play tapped, which is a drawback. To make up for that drawback, you get to gain 3 life. For 5 mana, that's a good amount of value.
What really stands out about this card is its Madness cost. It has an X cost in it, meaning that if you discard this card, you can choose how much mana to pump into it. Heck, it's probably worth it to pay 1BB for the token and 1 life, especially since it can be played at Instant speed when Madness is being used.
Here's the thing, though. Cards that cost 5 mana or more that don't have an immediate impact on the board tend not to do well in Standard. Granted, this card does have a nice interaction with Wayward Wanderer, which would usually gain you 3 life and make your opponent lose 3 life. But with Liliana's Mastery, you're getting an immediate power boost for your other existing Zombies, plus two 3/3 bodies that can block right away. Then, you can get an immediate 4 point life swing from the Wanderer (or more if you have multiple Wanderers on board). The immediate effect on the board is more obvious.
Both of these cards are good, but I see why competitive players have shunned From Under the Floorboards. With another Zombie lord, Lord of the Accursed, also in Amonkhet, the boost from Liliana's Mastery is likely enough for the Zombie player to make a lethal push. The Mastery definitely wins here, although I really like From Under the Floorboards in a White/Black Zombie deck that favors tokens and Anointed Procession, which doubles said tokens.
Which do you prefer: From Under the Floorboards, Liliana's Mastery, or would you just play both?
If you need some copies of Liliana's Mastery, you can buy them from your favorite Local Game Store, Amazon or TCGPlayer.