Sanguine Bond is an important key in many Lifegain decks, as it acts as a game closer
You can also find special cards with a delightful alternative borderless graphics
Enchantment Necrosynthesis Enchant creature Enchanted creature has "Whenever another creature dies, put a +1/+1 counter on this creature." When enchanted creature dies, look at the top X cards of your library, where X is its power
In its third step, the saga allows the player to destroy a target artifact controlled by each of their opponents
Even if you only get a few cards off him, he's a pretty good draw engine in a Jund shell, and even as a commander he can definitely do a lot of work - he restricts what you reasonably might want to use your removal on, but turning all your removal into cantrips is quite a scary thing when he also provides a reasonable win condition on his own
Mai, Scornful Striker This is just an elegant design, and something were familiar with on comps like Eidolon of the Great Revel