Originally Posted by dsg123456789
In addition to the modifications that Ob Freely stated that convert UGw to UGr Gro, I would also suggest dropping Sleight of Hand (plus another card) for Magma Jet. Jet functions as a weak cantrip at times, much like Sleight does, but Jet is much stronger because it can be removal and it sets up Predict.
I myself run 2 Strategic Planning and 3 Pithing Needle in my UGr Gro maindeck. Strategic Planning has proven to be nothing short of amazing. It allows me to get threshold extremely quickly, providing 3 cards to my graveyard, and it is strong in the lategame too, allowing me to dig for answers. It is like Mental Note, but it lets you choose which cards to keep and which card goes to the graveyard (like Mental Note+Sensei's Divining Top). I think that Strategic Planning merits maindeck slots due to its early game threshold enabling and lategame card selection.
Is Strategic Planning worthy of maindeck slots in Gro? If so, how many?