Often times, a card with Morph have a triggered ability that's unlocked when the card is turned face-up
The following rulings focus on what it means if your life total can't change: Spells and abilities that would normally cause you to gain or lose life still resolve while your life total can't change, but the life-gain or life-loss part simply has no effect
You can get three creatures back from your own graveyard or from your opponents in a 1v1 game, but thats clunky at 6 mana, youll have more juicy targets in a 4-player pod, especially with mill decks
Rumor has been circulating around Magic communities for ages about how once a player took one of these cards and ripped it up into a bunch of pieces, and tried to destroy every other card the little pieces touched
Liliana sticks around, and even if you have to sacrifice some board presence, you get to draw cards in the process