As you rest Anna and Elissa spend some time caring for the fallen huscarl, also intermittently checking that the indications of magic remain unmoving. While they are comfortable that they have stabilized him, given the nature of his injuries there is little that they can do to revive him.

Spoiler: Heal checks
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Anna (1d20+1)[8]
Elissa (1d20+8)[15]

Sven still lives, but has stabilized with negative hit points and he has suffered from suffocation from his burial. His injury may be treated, but due to the extreme hypoxia he suffered, he cannot be revived with anything short of a heal spell. If brought back to positive hit points and given a few days of rest, he should recover from his comatose state on his own.