While its better known as an interaction spell, stapling any amount of mana acceleration to a 2 mana counter is ridiculously efficient, and there are only a handful of counterspells in the game that would be considered better even after 30 years
By spreading the mana value of your cards throughout your deck, you'll ensure you have something to cast each turn
Butcher Ghoul, Geralf's Messenger, Gravecrawler, Nether Traitor, Bloodghast, and Reassembling Skeleton all fall into the first category
Only vigilance critters won't care
Minimizing one color can help offset this tendency, and this guide will make minimal use of black
Sidisi, Undead Vizier Perhaps unsurprisingly, Sidisi, Undead Vizier lends itself well to combo shells that rely on Sidisi exploiting creatures to find cards like Ad Nauseam or Doomsday