mtg cards you can cast from graveyard Building Around Leaving-the-Graveyard Effects in Commander with Teval Casting from the Graveyard. :

Yawgmoth, Thran Physician Yawgmoth, Thran Physicians proliferate ability is easy to activate multiple times in a turn, meaning you can quickly get your opponents to 10 poison counters

The second reason is to have a place where Wizards can reprint cards that come from sets and Secret Lairs that are part of Universes Beyond with Magic-themed artwork without impacting their scarcity too much

In Commander, you begin the game at 40 life

thus, you needed to gain life to get the extra effects

Card Images Product Information Magic: The Gathering Aetherdrift Commander 4 Deck Case Product Summary: Start your engines for a high-octane death race across the Multiverse