The Dalgard Lottery is a weekly event where you can pay just a small sum of emeralds and get the chance to win thousands of coins.
This is how it works:
You just go to the Lottery Office in Dalgard at any time and submit random numbers between 1 and 100 (max 10 numbers per player). You pay a sum of 5 emeralds per number you submit.
At Sunday 3:00pm, a random number is picked and the player with that number wins all the money paid in to the lottery plus 3000 coins. If more then one player has the winning number, they will share the prize money.
More info is displayed at the Lottery Office in Dalgard
You will find the Lottery Office at the west district in Dalgard. Just follow the gold orbs. The news board at the town square can tell you the way and will also display the names of previous winners.