Casual Black Bombs

Hi,

I m building mono black around [[Roshan, Hidden Magister]]. The goal is to use as many manifest cards like [[Innocuous Rat]] as possible as well as some morph to get a lot of value from Roshan. Moreover i have access to all freerunning, assassin or outlaw support cards and the good revival black delivers, while manifesting fills the grave quite good.

I m struggling a little with closing games though... so what are some good cards to manifest/revive, that can win me the game?

I know [[Grey Merchant of Asphodel]] is a menace and a hidden [[Phage the Untouchable]] is always funny.

Moreover cards like [[Phyrexian Obliterator]] are crazy if blocked carelessly xD same for [[unstoppable slasher]] if unblocked

So TLDR; apart from the above mentioned, what are strong black creatures to cheat in via manifest or revive, that win me the game?

Moreover, what are some great creature cards to manifest to give my opponents a nasty surprise when turned face up? 😄

THX