Here is the location for each greater Drake. This is end game content and cannot be completed before completion of the story. You need all Tribute items obtained from the vaults. Information gathered from the Nexomon official discord so all thanks to those guys.
Tribute of Power
This drake is located south of Outlands. From the Outlands teleport keep traveling south until you reach the abandoned town, exit through the south then immediately to your right there's an entrance. Loop round and head north through the entrance you saw, keep heading north until you reach the abandoned mansion at the end of the path.
Tribute of Decay
This drake can be found from the teleporter of the Immortal Citadel going all the way east until the end where the giant skull is located.
Tribute of Blaze
This drake is located north of Ignitia. From the teleporter head north into the next map then proceed to the north again. Once in the next map head west to the map with a big skeleton, head west from the skull and follow the grass around to the golden chest. She will be standing under the tree to the right.
Tribute of Mind
From the teleporter in the Immortal Citadel head west into the next map then head north and you will immediately be at your destination.
Tribute of Thunder
This drake can be found in Palmaya. If you follow the southern route you will come across green grassland with a mound in the middle and that is where this drake is located.
Tribute of Ocean
For this drake from the Frozen Tundra warp head south into the next map then south onto the map with the cave to the right. Now take this map to the west. This brings you to a frozen lake. Walk around the lake heading west then south. Once you have entered the new map, take the stairs to your left up into the next map north and this the location for this drake.
Tribute of Tempest
For this drake from the teleporter at Drake isles head south once then west then west again and north until you get to the decayed building.
Tribute of Nature
For this drake you want to go from the teleporter in the Hidden Forest and exit the village via the south exit. Travel east all the way until you reach 2 pink mushrooms which look like they block the path but you can actually walk over these follow this path east until you are at the spawn location.
Tribute of Stone
For this drake you want to start off at Lateria and head west out of the city, then head north and follow this path around to the skull, and this is the location of the drake.