Quote from peteroupc »If Narset keeps you from drawing a card, Tomorrow's ability can't replace that with looking at the top three cards of your library and its other effects instead. In general, if something is impossible, it can't be replaced (C.R. 614.7, 101.2, 101.3; see also C.R. 614.17c).
If you control Tomorrow and an opponent controls Narset, and you haven't drawn a card yet this turn, and—
if you would draw one card, then you can still choose to look at the top three cards of your library, etc., instead. Once you do draw a card, however, it would be impossible for you to draw any further card in the same turn (while an opponent of yours controls Narset), so Tomorrow's replacement effect won't be invoked further. if you would draw more than one card at once——as a cost or as a choice (for example, Consecrated Sphinx or Sylvan Library [C.R. 118.12]), then you can't pay that cost or make that choice (C.R. 121.2b).
—other than as a cost or choice, then you draw them one at a time (C.R. 121.2). You can apply the replacement effect of looking at the top three cards of your library, etc., multiple times this way (C.R. 121.2b), but once you choose not to and actually draw a card, any further card draws you would do would be impossible, so they can't be replaced and are ignored (C.R. 614.7, 121.6b, 101.2, 101.3; see also C.R. 614.17c).
For example, if you control Tomorrow and an opponent controls Narset, you haven't drawn a card yet this turn, and an effect makes you draw three cards other than as a cost or choice, you have the following choices:
Apply Tomorrow's effect three times. You will not have drawn any cards.Apply Tomorrow's effect twice, then draw the third card.Apply Tomorrow's effect once, then draw the second card. The third card can't be drawn, so nothing further happens.Draw one card. The second and third cards can't be drawn, so nothing further happens.
See also this thread.
If you control Possessed Portal and Tomorrow, and would draw a card, you choose whether to skip that draw entirely or to replace it with looking at the top three cards of your library, etc., due to Tomorrow (C.R. 616.1).
Quote from delost »How are you choosing to not apply Tomorrow’s ability? It’s a replacement effect without a may in it.
Quote from user_938036 »You can't ever choose to draw a card while you control Tomorrow. Peteroup was assuming there was a may involved. Because you can't ever draw a card Narset's static ability will never prevent you from "drawing" cards.
Quote from Ryperior74 »I might need a simpler answer but I somewhat get what you people saying
And yes the third comment is correct it’s not a “may” ability which is why I asking in the first play
I guess the real question is do I get another trigger if a try to draw a card and something like Narset/leovold/notion theif is on the field I’m wondering if it gets around that since it replaces drawing with anticipate triggers
Quote from peteroupc »If you control Tomorrow while an effect says you "can't draw cards" (e.g., Maralen of the Mornsong), you can't apply Tomorrow's effect.