While it might be great to stop a game-winning spell from resolving, you will generally be down a card compared to two or more of your opponents at the end of any exchange that wouldnt end the game without your intervention
Do you miss the enters the battlefield phrasing
For example, if youre on the play and your starting hand after a mulligan contains a one-drop, two two-drops, two four-drops and two five-drops, then I will usually start on turn one by inking the worst four-drop
This card is simple, powerful, and brutal all at once
The aforementioned Cloudblazer combines with Eldrazi Displacer to give you a card draw engine that lets you convert every three mana you spend into another instant-speed Divination plus two extra life
Never rely on drawing into lands, even if the rest of your hand is perfect