I'm not quite sure about the interaction between the stack and multiple-card draws.
120.2. Cards may only be drawn one at a time. If a player is instructed to draw multiple cards, that player performs that many individual card draws.
According to Is drawing multiple cards an atomic action?, this means that:
"draw 2 cards" really means "draw a card, then draw a card". - diego
Now, my question is: Does that mean that a player, affected by a multiple-card draw (Divination for example), can draw one card and avoid drawing any more by activating Sundial of the Infinite inbetween individual draws?