Don't expect this to cut opposing libraries to 0 fast enough
There are five in total, each one only available for a limited time
The other four have creatures that enter and draw a card, or have card draw as a passive effect, or have an activated card-drawing ability
Getting protection from everything is definitely one of the better things you can do at instant speed, but when you can do it all, Reclamation SageReclamation Sage becomes a two-for-one, Hammer of NazahnHammer of Nazahn is a combat trick that leads to more combat tricks, The Meathook MassacreThe Meathook Massacre is a catered board wipe you can engineer into a combat step, Narset, Parter of VeilsNarset, Parter of Veils is even meaner than usual, and you can cast your Treasure CruiseTreasure Cruise instead of losing it the next time you put a Wheel of FortuneWheel of Fortune on the stack (actually you need to do that in the reverse order)
If Nadu leaves the battlefield and returns to the battlefield in the same turn, or if Nadu leaves and another Nadu appears, the triggered ability granted by the new one is different than the triggered ability granted by the old one
But alas, every piece must come to an end
