Not every Jedi perished in Order 66. Kanan Jarrus survived the Emperor’s purge, going underground for years and hiding the truth about who he really was. To keep his past a secret, Kanan carried a blaster -- an uncommon practice for a Jedi -- and used a lightsaber that had to be assembled. He was a leader among the Ghost crew, a small group of rebels looking to strike back against the Empire, and with the emergence of the Force-sensitive Ezra, once again embraced his identity as a Jedi Knight.
Sith holocrons hold knowledge and wisdom that can only be accessed by dark side practitioners. The artifacts can also be used as keys to unlock temple doors. The Sith temple on Malachor was the home of a Sith holocron that Maul attempted to steal with the help of Ezra Bridger. When placed in the temple's obelisk, the holocron could create a super weapon, designed to take life. Maul's plans were foiled, however, when Ezra and his Master Kanan were able to pull the holocron from the obelisk just in time.
Holocrons are ancient repositories of knowledge and wisdom that can only be accessed by those skilled in the Force. Jedi use them to record and preserve their teachings, creating a record for future generations seeking to understand the mysteries of the Force. During the time of the Republic, countless holocrons were stored on Coruscant; after the Jedi purge, however, they became scarce remnants of an era long gone.
A remote world of rock, the rebellion sought to establish a secret base on Atollon. But the planet was not as devoid of life as originally believed. Giant, multi-legged, spider-like creatures called krykna lived below the surface. They were aggressive beasts and relentlessly attacked the rebels. Eventually, the freedom fighters were able to repel the krykna using sensor markers and could keep their new home base.
Larger than fully-grown humans, krykna were giant, spider-like creatures native to the remote world of Atollon. Predominantly white, they had six powerful legs, eyes around their head, and a blaster-resistant hide, making them fierce hunters. They often take their prey into an underground hive, where they cocoon their victims. Krykna attacked the rebels looking to establish a base on Atollon but the creatures were repelled by sensor markers.