With his codex powers, Dylan Brock connects to the symbiote hive mind and is able to remote control the Venom symbiote even though it was hundreds of miles away in a deserted island with Eddie Brock and the Carnage symbiote. Dylan steps into some sort of a portal and gives the Venom symbiote a power boost, changing its shape into a Tyrannosaurus Rex.
From – Venom Vol. 4 #24