If you were hesitant to go for an unfair approach in Cube before now, hopefully you are coming away with the tools to identify and take advantage of some of the sideways strategies available, and become the unfairest of them all
When this land enters, sacrifice it unless you return an untapped Plains you control to its owners hand
While these are nice utility for longer grindy games the benefit these offer don't stack like Phyrexian Altar or Goblin Bombardment and so they are far less useful in a bursty combo sense
While you control, Liliana's Undead Minion, nothing can cause you to lose the game
If the deck is built to utilize her for a single combo turn instead, however, then the temporary protection might be all you need
It effectively gives the player more options, and its a fun bit of design