What the source confirms
The official experience thumbnail visibly names Ninja Star and labels it Rare. That makes the identity and rarity safe to publish.
Role hypothesis to test
Compare its coverage against your current ranged slot during a real run.
What remains unknown
Projectile behavior and upgrade curve need in-game verification.
Run a controlled comparison: keep the rest of your loadout stable, change this slot, and record what ends the run. That result is more useful than a copied tier label with no patch or source.