- "What were you stabbed with?"
"I don't know." - ―Christine Palmer and Doctor Strange[src]
Space-Time Shards, also known as Space Shards[1], are weapons used by the Zealots which were created through their Magic drawn from the Dark Dimension.
History[]
Zealots[]
Summoning of Dormammu[]

Kaecilius creating a space-time shard as a weapon
The Space-Time Shards were mystical constructs manifested by the Zealots to be used as weapons. They massively used them during their attacks on the different Sanctums. One Master of the Mystic Arts was stabbed in the back by a Space-Time Shard while attempting to flee to Kamar-Taj.

Doctor Strange being stabbed by Lucian Aster
Kaecilius and two other Zealots used Space-Time Shards during the Battle at the New York Sanctum. Daniel Drumm was killed after Kaecilius stabbed him twice with a Space-Time Shard. Kaecilius and his Zealots then attacked Doctor Strange with their Space-Time Shards, although he was able to parry most of his attacks with his Eldritch Whips. The Cloak of Levitation also protected Strange from being stabbed by a Kaecilius armed with a Space Shard. Eventually, Strange was heavily wounded by a Space-Time Shard thrown to him by Lucian Aster, forcing him to retreat to Metro-General Hospital to be healed by Christine Palmer.

Zealots using Shards against the Ancient One
Back to the New York Sanctum, the battle between the Zealots and the Masters of the Mystic Arts was resumed, with the Zealots once again massively using Space-Time Shards to attack their enemies, including the Ancient One. Using her Tao Mandalas and her mastery of martial arts, the Ancient One was able to repel her opponents, but ended up fatally stabbed by a Space-Time Shard wielded by Kaecilius, who pierced through one of his Zealots to reach her.

Kaecilius attacks Doctor Strange with a shard
Kaecilius and his Zealots manifested Space-Time Shards when attacking the Hong Kong Sanctum, with Wong being one of the victims, although he was later resurrected when Strange reversed time. Kaecilius attempted to strike Strange with a Space-Time Shard before he could activate the time reversing spell, but failed as his weapon stopped right in front of Strange's face.[2]