Beyond Standard, its simply broken with the Evoke elementals in Modern, while in Legacy cards like Force of Will and Terminus again cheat the 5-casting cost clause
If the deck is built to utilize her for a single combo turn instead, however, then the temporary protection might be all you need
Actually drawing Living End is a problem for the deck, so he plays more cards because he doesn't want to draw the most important card
Many a green mage was seen conceding after they had no answers to a turn six King Crab with four green creatures already on the board
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
While you control, Liliana's Undead Minion, nothing can cause you to lose the game