How to create Dragon Egg Oil
Dragon Egg Oil is an item that was introduced during the Velious expansion and made with Brewing. All you need in order to make it is a Dragon Egg and a Water Flask, the Dragon Egg is the hardest of the two reagents to find.
The only way for you to get a Dragon Egg is to Forage it from one of two zones, Western Wastes of Temple of Veeshan. Both of these zones can be unfriendly to people who aren't in a group, but arguably Temple of Veeshan is the safer of the two for Foraging so long as no one is raiding while you're there. The only way you can die in ToV is if a raid (or player) pulls a Drake enemy to the entrance and you get hit with their AoEs.
In Western Wastes though, enemies roam all over the zone and have an extremely large agro radius. From what I have seen - no where in Western Wastes is safe except maybe the zone line to Siren's Grotto. Even there though, you can get trained pretty easily.
Dragon Egg Oil (150 Trivial)
Combine both of these items in a Brewing Barrel.
1 Dragon Egg