Certainly you can Disenchant a Necropotence but they can still draw as many they like for that turn and the damage is done
Legendary Creature - Demon Cat Commander (CTRL to add secondary) Boom Purphoros, God of the Forge Indestructible As long as your devotion to red is less than five, Purphoros isn't a creature
It effectively works like a temporary land that upgrades, and then sacrifices itself
The effect card advantage has on games can't be ignored, granting most options that draw cards a high value
However, Shared Animosity has got to be my favourite of these options because it buffs all your creatures by the number of creatures youre attacking with of the same type
First of all, it animates all lands in play, making it an easy way to expose opposing lands to removal