This card is usually free to cast, especially if you run inexpensive commanders like Rograkh, Son of Rohgahh
Chaos: Whenever you roll Chaos, target artifact creature gets +X/+X until end of turn, where X is its converted mana cost
Sheer Drop is a feasible creature removal effect, and Coastal Discovery an adequate card drawing spell
The problem with Darkness blanks, however, is that there really arent many cards to begin with, let alone cards with little text on them
How this works is whenever Shredder, Shadow Master attacks a player, each other player at the table gets a non-legendary token copy of Shredder, Shadow Master, which enters tapped and targeting the same player