Creature - Goblin Gollum, Obsessed Stalker Skulk (This creature can't be blocked by creatures with greater power.) At the beginning of your end step, each opponent dealt combat damage this game by a creature named Gollum, Obsessed Stalker loses life equal to the amount of life you gained this turn
A good reason for going mono-black is that black can cover almost all bases well (except artifact destruction)
I like board wipes that give you control over what sticks around, and being a permanent makes this an interesting, maybe even oppressive sweeper
Well, you might know, actually, because the discover keyword action allows you to dig into your library and cast something for free
My biggest issue with this card is probably its color identity
Dread Fugue and Concealing Curtains are the real deal