For the ??? quest; you need to go pick up the 3 meteors shards in the 3 locations below:
https://map.wynncraft.com/#/-824/64/-4924/-2/0/0 (The meteor is Inside the broken moutain, in the water)
https://map.wynncraft.com/#/-881/64/-5407/-2/0/0 (In the north of Gelibord)
https://map.wynncraft.com/#/-1743/64/-5012/-2/0/0 (Near the black orc camp)

When you have the 3 meteor shard, go to the giant meteor at:
https://map.wynncraft.com/#/41/64/-4998/-2/0/0

And there is a Brown carpent where you can throw your 3 meteors shards. Throw them, it will open a door.
Go Inside the meteor and solve the puzzle (The code is 1754)

And talk to Mehme :)