your deck cant afford drawing an average of more than one Blightsteel Colossus-tier threat every game
Then, on top of that, you can pay 2 generic mana to Replicate it (a mechanic last seen in original Ravnica and related reprinted cards I believe) the spell, which creates a copy of it for every time the replicate cost was paid
Next, we will look into some interesting tech for them, as well as whether they would fit into the 99 of the main deck for any other existing commanders
If one of those creatures can't attack its owner that turn due to a spell or ability (such as Chronomantic Escape), you may have it attack another player, attack a planeswalker an opponent controls, attack a battle an opponent protects, or not attack at all
Its possible Merfolk still wont have what it takes to be a top tier Pioneer deck, but Cenote Scout is a large upgrade, nonetheless
Collective Brutality Another card that is so good you are more than happy playing it with no graveyard synergies at all