Worldline Zero

Worldline Zero is an Arc Exotic Sword created by Elisabeth Bray, introduced in the Destiny 2: Warmind expansion. Its flavor text reads "A single strike can alter the course of history." Its "Tesseract" ability was noted to interact with a Warlock's glide double jump, launching the wielder farther than any other non-vehicle ability.

Acquisition

• Current: after Destiny 2: Beyond Light it is available through the Exotic Archive at the Tower (the Monument to Lost Lights kiosk). The cost is 1 Exotic Cipher, 125k Glimmer, 200 Legendary Shards and 1 Ascendant Shard. Only after it has been earned once.
• Historical (Warmind): collect 35 of the 45 Latent Memories on Mars by destroying each with its matching element (Void, Solar, Arc or kinetic). Memories that look like static need a Valkyrie, from public events or a Rasputin Armory Code. Then interact with the cache in the Core Terminus Lost Sector in Braytech Futurescape, which reads "ANSERIS - 35 Cache Data Required".