RIFT has added two new Trove crossovers, you can unlock the Chloromancer class in Trove by playing RIFT, and unlock a Peaceful Hills dimension in RIFT by leveling in Trove.
Please note: This method does not work for console users.
UNLOCKING CHLOROMANCER
Finding Chloromancer Evort as Guardian
As a Guardian head to Sanctum, if you have just completed the tutorial you will have to brave level 14ish npcs on the road, if you stick to solid paths there are more chance they have been cleared.
As you cross the bridge into Sanctum, head to the right around the statues to the left of the green topped structures.
Chloromancer Evort is standing next to some reindeer in the location.
Finding Chloromancer Evort as Defiant
As a Defiant you will need to head to Meridian
From the entrance to Merdian you will want to reach the next archway and turn right
This is the next archway, turn right
Here he is, right in the corner.
Get the Quest
Just speak to the NPC and you will be offered a quest, talk to him again to complete the quest.
Use the Item
You will find the cube placed in your inventory, open it and right-click it to unlock the class in Trove.
OTHER CROSSOVER REWARDS
These are found on a mailbox
Dimension: Peaceful Hills
Obtained by: Reaching level 5 in Trove
Cubic Cloak
Obtained by: Reaching level 10 in Trove
Mount: Vox
Obtained by: Reaching level 20 in Trove.