A handful of cards help protect characters or heal their damage, including the Dinglehopper, which can continuously remove a point of damage every turn
Extractor Demon is an interesting cube option
They would be considered marked otherwise
For 4 mana, you get a great creature, ramp, and pump
Mass land destruction, however, remains the most brutally cruel and viciously polarizing thing you can bring to an EDH table, so if you fancy sleeving up a Numot, the Devastator deck with Armageddon and all the trimmings, consider yourself duly warned!
It reads, At the beginning of combat on your turn, equipped creature or a creature you control named Vecna gets +X/+X until end of turn, where X is the number of cards in your hand. Finally, The Book of Vile Darkness is a three mana Black Artifact that lets you create a 2/2 Zombie token if you lost two or more life in your turn