Jace awakens on Ixalan without a name or a reliable account of how he arrived. Attempts to planeswalk fail against the same strange sigil. Hunger and isolation become immediate problems that cannot wait for a recovered biography.
He learns through failure, using the abilities and general knowledge that remain while becoming aware that illusions cannot replace food, shelter or judgment. Searching inward finds the part that should permit escape, but the world still holds him.
The Belligerent eventually reaches him. Vraska recognises Beleren and approaches expecting an enemy, then finds someone plainly unable to play that old role. Rescue opens a new relationship because the past is absent, not because the past never happened.