edh casual coffers control help

[night ingot]

I have been working on this mono black coffers deck for a while now and I like it. I try to avoid steal effects or other effects that are awkward on webcam, and I try to avoid infinite combos.

What I really want is just two more scary threats. But I'm less interested in "scary because it draws cards and makes opponents scarifice stuff. And I'm more interested in "scary because you are dead in two turns" type of cards. (both is good, if there is something with both). I would prefer at least 1 creature to not go too low on hits for breach the multiverse etc. But I'm good with any card type. Could also go for something with a good repeated ability/mana sink that does the job. When I goldfish this I regularly get to 20+ mana on t7

https://www.moxfield.com/decks/ApT7WT6RmUmRvNE3s5857w

[timber basalt]

The haunt of HighTower can, if protected, be a very fast growing scary threat saying that whenever a card is put into an opponents graveyard this gets a +1/+1 counter and its a flying lifelinker

pros
it has evasion with flying
it can keep you in the game with lifelink
it can grow very fast

cons
its 6 mana for a base 3/3
it has no base protection against removal

and lets say you mill all your opponents for 10 cards with breach the multiverse with this on the battlefield, since its not one or more cards. i belive it woud then be a 33/33. (dont take my word for it, its just my understanding of the card since it says "a card" still good if that dont work)

Sheoldred // The True Scriptures

while its front is not all that good for finishing a game, the back saga is really good, and its 3 part of just putting all creatures from all graveyards onto your battlefield can be really good depending on what is in your opponents graveyard

pros
has some good effects and can finnish a game with 3 chap of saga backside
some creature destruction, mill and discard to get some jucy stuff in said graveyards

cons

its a total of 10 mana for the effect
its back side is a saga, and needs to go to its 3 prog in order to do its thing
it has no self protection^

thease are just some of the things i know of, there are proberbly better ones but yer