MTG Salvation

Hey there I have been thinking of making a different Shattergang Brothers deck that had an emphasis on when an opponent does something, something bad happens. The inspiration for the idea would come from Deep-Sea Kraken and Rhystic Study but felt like a more controlling commander like Shattergang could work nicely if there is enough support.
The examples of what I have together currently would be:

• Polluted Bonds
  
• Painful Quandary
  
• Forgotten Ancient
  
• Mogis, God of Slaughter
  
• Archfiend of Depravity
  
• Gutter Grime
  
• Kazuul, Tyrant of the Cliffs
  
• Dragonlair Spider

Other cards I'm considering that are close to the emphasis but not quite right/ or everyone can be effected or trigger:

• Pain Magnification
  
• Geth, Lord of the Vault
  
• Huntmaster of the Fells
  
• Defiler of Souls
  
• Keldon Twilight
  
• Havoc Festival
  
• Zo-Zu the Punisher
  
• Heartless Hidetsugu
  
• Bane of Progress
  
• Ruric Thar, the Unbowed
  
• Heartwood Storyteller

I'm looking for more card ideas to see if I can actually make a deck with the idea in these colors

Some cards that might interest you:

Spellshock
Kaervek the Merciless
Sheoldred, Whispering One
Æther Flash
Unnerve
Myojin of Night's Reach
Syphon Mind
Molder Slug
Spreading Plague (makes an almost-lock with Darkest Hour)
Blood Seeker
Blood Artist
Cauldron of Souls
Brand of Ill Omen
Umbilicus/Blood Clock
Mindslicer
Managorger Hydra
Nether Void ($$$)
The Abyss ($$$)
Oppression
Planar Chaos

This deck is buildable only if you're willing to run a couple symmetrical effects.

Some other cards I'm thinking work

• Grave Pact
  
• Dictate of Erebos
  
• Ob Nixilis, Unshackled
  
• Overseer of the damned
  
• It the Betrays
  
• Massacre Wurm
  
• Butcher of Malakir