Scission

Scission is the second encounter of the Root of Nightmares raid, inside the Witness's command ship Essence. It is a location in the Pyramid, and it first appeared in Destiny 2: Lightfall. Its connecting areas are Cataclysm and Macrocosm. After the fireteam slows Nezarec's heartbeat, the Guardians must traverse Scission to reach the Tree of Silver Wings in the Pyramid's heart.

The encounter's gap is split across the team, with three players on each side. Each side uses a buff from one of two node networks, and a "gap jumper" on each side crosses with the pistons to activate the next node. Meanwhile the rest of the team clears waves of enemies, including Shadow Legion forces, and must stay near the aura node to damage the Redolence enemies. Once a network is complete, a Major Redolence spawns and defeating it drops a shard that activates the piston to the next level. An Imminent Expulsion timer wipes the team if it runs out, and it disappears once both networks are complete. Sources describe the mechanic slightly differently, with one describing a ravine and Shadow Legion and another describing the node-building across the gap, so the exact sequence may vary.

Scission is referenced by Acasia's Dejection.