GHOSTLY FLICKER Speaking of Blink, Ghostly Flicker remains the most powerful of the Blink spell suite
Undying is creature-based recursion mechanic that is essentially the mirror of persist
Sarkhan, Fireblood is that turn 2-3 ramp card you want to be casting in Dragon Tribal, basically a superior Urza's Incubator since for most turns you'll only be casting one Dragon per turn and Sarkhan also mana-fixes and also can rummage for you if you don't have a Dragon spell to cast
Of course, there are cards that combo well with Grandmaster Wizard allowing you to further draw more cards
For example, lets just highlight Return of the Wildspeaker real quick to show how powerful these types of spells are
For Commander, the number of lands you want to run in your mono-white decks can vary a lot based on how low your curve is and how many mana rocks and other ramp pieces youre running