Since Jeskas Will only costs three mana, you will have additional resources to deploy the cards you exiled before they disappear
If you're collecting, i'd reccomend going for the sleeved booster packs or the blisters
The Pokmon featured on them will be as follows: Charizard, Dragapult, Dragonite, Drampa, Eevee, Hatenna, Hydreigon, Jigglypuff, Koraidon, Miraidon, Pikachu, Quagsire, Rayquaza, Roaring Moon, and Umbreon
While it can be useful for stopping specific cards, it is largely to niche to be that useful for a player compared to other spell cards
In the event that you are pressed for life, even in a Commander game, Sylvan Library still lets you draw two cards and put two back, at the very least improving the quality of cards in your hand for a turn or two