The escorts are the first step of the Triple Trouble meta event chain. All escorts, one for each of the three wurm heads, will start simultaneously. All three must be completed in order to make the Amber, Crimson, and Cobalt wurms spawn. and boons as possible.
The escorts work, more or less, the same way for each head:
Starting from the Firthside Vigil Waypoint, an NPC asura must be escorted to the event arena where the great wurms spawn (Amber to the east, Crimson south and Cobalt north of the WP). On the way, multiple eggs and wurms and possibly other mobs - including some enemies which always spawn in the area, but still attack the NPC - have to be killed to keep the asura safe.
If one of the NPCs stays dead for more than 5 min in total (reviving does not reset the timer), the escort events fail; none of the wurms will spawn.
All players, except 1-3, should run ahead to the eggs. Always attack the eggs first and only focus on other adds once the eggs are cleared because eggs will hatch into larvae if not cleared in time. Reflects help against the larvae.
Escort husk: Towards the end of each escort, a champion husk will spawn. It is the only husk which players can get loot from. To get kill participation, use condition damage or CC (crowd control / control abilities) against the husk.
Escort achievement: Each head has a special escort achievement.
On Amber you can get the wurm bait after a little walk once the husk (spawns after the 3rd set of eggs) is killed - an abomination must be killed, then there will be the white field on the ground that players can run through to get the achievement.
On Crimson people can get the phytotoxin enthusiast after the 2nd set of eggs - there will be a red color cloud that players need to run through.
On Cobalt you can get the wurm kleptomaniac on the little island after the 3rd set of eggs - a pirate must be revived, then players can pick up the bottle of rum to get the achievement.
Cobalt escort
Crimson escort
Amber escort