Location: Rune Forest
The reward for this mini-quest is the amber pendant, required to get the Mark of Association. The amber pendant is bind-on-take, so you shouldn't buy it from other players.
Note: To trigger Sombar, you need to be level 40(?) or below.
If you're higher level, you can peek the guild master to determine if the tome is available (or not), then accordingly dig in the easternmost Flower Bed room. In this case, you'll only do steps 1, 4 and 5. You can also get the tome from another player. In this case, you'll only do steps 1 and 5.
You'll need a spade, a pick axe and some gold coins in hand to do this mini.
1. Trigger the guild master.
Visit the guild master at the Order of the Malachite Golem, in Rune Forest. Sayto guild quest. He will ask for 100 gold. Give 100 gold guild. He will tell you Sombar stole an unholy tome from his library, and ask you to return it in order to join his order.
2. Trigger Sombar.
Visit Sombar. If he's alive, he's in one of two possible locations:
Give 1 gold Sombar to trigger his first speech. He will ask for dragon's blood.
3. Get a shot glass of dragon's blood and give it to Sombar.
Two possible ways to get a shot glass of dragon's blood:
Two possible outcomes:
'Thank you my friend.' Sombar says to you. 'I only wish I could offer something in return.' Sombar drinks blood from a shot glass of dragon's blood. Sombar says to you, 'The head park keeper knows the location of an ancient artifact.' 'Say to him Sombar sent you.' Sombar says to you. 'I would be grateful if you could return this artifact to me.' Sombar says to you.
'Thank you my friend.' Sombar says to you. 'I only wish I could offer something in return.'
4. Get the unholy tome.
If Sombar sent you to the head park keeper, you'll want to skip that part because it's broken (the park keeper always says there's no tome).
Go to the easternmost room in A Flower Bed. Get your spade and pick axe, and dig until you uncover the tome. Get the tome.
5. Give the tome to the guild master, to get the amber pendant.
Return to the Order of the Malachite Golem. Give the tome to the guild master and he'll give you an amber pendant as a reward.