Advancing Weapon FusionTweet
(from Starfinder Armory)
When you defeat a foe, a weapon with the advancing fusion draws you further into the fray. The first time each round that you make a successful melee attack with an advancing weapon that drops a foe (by killing it or rendering it unconscious), you can take a guarded step as a reaction. This movement must move you closer to at least one foe.