Magic Origins Seeded Prerelease Booster Jace has no variants:
Explore this pack in Sealed.

Sheets

Sheet common

At rate 1/19 (5.26%)
Artificer's Epiphany
Aspiring Aeronaut
Bone to Ash
Calculated Dismissal
Claustrophobia
Deep-Sea Terror
Disperse
Dreadwaters
Faerie Miscreant
Maritime Guard
Negate
Nivix Barrier
Ringwarden Owl
Scrapskin Drake
Screeching Skaab
Send to Sleep
Separatist Voidmage
Stratus Walk
Watercourser

Sheet uncommon

At rate 1/11 (9.09%)
Anchor to the Aether
Clash of Wills
Hydrolash
Jhessian Thief
Psychic Rebuttal
Sigiled Starfish
Skaab Goliath
Sphinx's Tutelage
Tower Geist
Turn to Frog
Whirler Rogue

Sheet promo

At rate 2/15 (13.33%)
Alhammarret, High Arbiter
Harbinger of the Tides
Mizzium Meddler
Soulblade Djinn
Talent of the Telepath
Thopter Spy Network
Willbreaker
At rate 1/15 (6.67%)
Jace, Vryn's Prodigy
Jace, Telepath Unbound