Sanguine Bond is an important key in many Lifegain decks, as it acts as a game closer
7 Kefka, Court Mage/Kefka, Ruler Of Ruin - $125 Full-Art Surge Foil The big bad of Final Fantasy 6, Kefka is one of the few antagonists who actually beat the heroes, at least for a time
No one cares about your Spider-Man obsession, Flash. Liz Allan Illustrated by Gal Or Standard Legal Alchemy Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
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
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