A one mana 13/13, Deaths Shadow gains -X/-X, where X is your life total
You can also use Animation ModuleAnimation Module to create Servos, and sacrifice them for mana
While its less true than it used to be (thanks to FIRE design, cards designed for Best of 1, and increased modality/card draw in general), its still a key part of gameplay and it feels like what this mechanic, and in particular, gifting a card, was designed around
Into the Inklands will include two Starter Decks featuring combinations of Amber/Emerald or Sapphire/Ruby cards, priced at $16.99
I have already built a Commander deck around New-Sheoldred and it includes Mono-Black Group Hug like Howling Mine, mass card draw like Dark Deal, and lifegain matters cards like Vito