Its a nice uncommon that allows you to shuffle your library or rearrange X cards deep, where X is the mana you spend
With a sacrifice outlet, it literally pays for itself, making it a better Myr MoonvesselMyr Moonvessel in just about every way, starting with the option to remove a utility creature or grab a Treasure token
You won't see any signficant moves up or down right now
Even if you dont deal a ton of damage this way, triggering saboteur abilities twice is already strong
In Modern, CotV mainly sees play to have hate interaction against one drop creatures like DRC and Ragavan and 0 mana spells like Living End, Glimpse of Tomorrow or Crashing Footfalls
In Commander, there are plenty of ways to generate unbelievable amounts of energy get something like a Sphinx of the Revelation going and Galvanic Discharge practically removes any creature by the late game