Does Ravenborn Tome work with spells that have multiple hits, like Falling Star dealing 2x 4 damage?

Ruling: Yes, Ravenborn Tome works with spells that deal damage multiple times. Each instance of damage the spell deals is increased by one.

Sequence:

• Ravenborn Tome increases each separate instance of damage
• For a spell like Falling Star that deals damage twice, each hit is increased by one