Bearer of Silence

The cast trigger is the whole design proposition here, and it is built around a window most removal does not get. Because the sacrifice rider fires on cast rather than on enter-the-battlefield, paying the extra colorless strips an opponent of a creature before this body ever resolves: the trigger sits on the stack independent of the spell, so countering the Eldrazi does nothing to stop the edict. That timing is the premium you are paying for, and the colorless pip in the cost is the discipline that prices it: you only get the sacrifice if you can produce that specific mana, which ties the effect to a deck willing to lean into colorless sources rather than splashing it freely. The flying 2/1 that can't block is almost incidental to the contract; it is a clock, not a wall, which is consistent with a card meant to apply pressure while quietly eating a blocker on the way down. Edicts have always been black's answer to hexproof and protection because they make the opponent choose what dies, and routing that effect through a cast trigger rather than the creature itself is the wrinkle that distinguishes this one: the removal is guaranteed the moment you commit the mana, regardless of what happens to the creature afterward.