Tomb of Yvenia
This tomb can be found in an underground cave under Fort Tarsis. You can enter it through the connected passages on the north and south sides of the fort.
How to open
Treasure chests - Find and open 15 different treasure chests that are scattered throughout the map.
Harvest - Destroy 25 Mineral Nodes (looks like colored stones) and Plantation Nodes (looks like plants).
Jewel repair - explore the world in free play mode and look for battles with the Guardians. All you have to do is help them in battle and then fix them (3 in total).
Collectibles - Find 10 different collectibles - for example, new places, scraps, documents in the camps and more.
Tomb of Artinia
Located north of Fort Tarsis, in the Academy Ruins.
How to open
Complete 5 World Events
30 weapon kills
15 Weak Enemy Kills
9 elite kills
Tomb of Gavns
Located in the northwest corner of the map in the Dawn Keep area.
How to open
50 melee wins
50 final kills
3 legendary kills
Tomb of Karif
It is located in the northeastern corner of the map in the Emerald Abyss area.
How to open
Complete 3 missions
30 Mechanism Kills
15 combo triggers
3 multi-kills