78-A and 78-B are two entities that can combine into one:1515, if this happens it will summon either Lilly's Promise or [REDACTED] and either all life on Earth or Reality itself will end, [REDACTED] is an event in which a cosmic entity will destroy exictance entirely, once combined nothing can stop then except SCP-682 can slow them down, also if you look at the two with SCP-1499 your whole vision goes red and all you see is SCPs 78-C-Omega