Because sometimes the combo piece is sitting in the top 4?
Across 3 or 4 opponents, it happens more often than you think.
There's a much smaller chance that the card they're looking for is sitting at position 5 of their deck, and you just made them draw it next turn. That's not really worth considering in the face of the much larger chance that you just exiled an important card in their top 4. And it just isn't worth thinking about anything deeper. If the card was 6 cards in, they wouldn't have drawn it after you played Jeleva, and likely would shuffle their deck before they do (fetch, tutors, ramp, etc), because nobody knows the card is now only 2 cards away.
Sensei's Divining top can change the math a bit, but only for players who have it out.>>41452645
Exactly. it's not the main reason I play Jeleva, but it is a small upside to playing her. When I built the deck, I wanted to use Doomsday, and grixis colors. I looked at all the generals in grixis, and decided Jeleva complimented it the most. She can either cast Doomsday for free (the worst outcome because it's so telegraphed), or more likely, sandbag some cantrip that I can cast for free after playing doomsday, which makes the piles much easier to form, and more resilient.
The fact that she can disrupt opponents while doing so is just a bonus.
And then I realized she's great for a storm based wincon too, in much the same way. She can either cast Ad Nauseum, Yawgmoth's Will or a Storm Card for free, or more likely, cast cantrip for free, which can help to get there.
It's not often that I even play the commander in the deck. But it's nice having a general that compliments the strategy, instead of what is functionally a vanilla card (every other grixis general) within the context of that strategy.
And given my success with the strategy, I think it's the most powerful way to play grixis.
Probably not the most fun though, unless you really like solitaire.