And if that wasnt enough, you can get a hard to counter instant speed Pyroclasm by using the discard ability
For your life total to become 1, you will gain or lose the appropriate amount of life
On top of this, merfolk have many tactics to ramp up quickly
It can also turn off interaction for a turn, letting you push for a win early on
As Ive said for a long while, Entomb Reanimator would likely remain a worse version of Stiflenought, potentially stretch sideboards too thin, further accelerate the format, and put additional pressure on aggressive creature decks
The fact that it grants the card advantage ability to all of your creatures means that you can pair Nadu with any free, repeatable way to target your creatures and go absolutely ballistic