You find them at the end of Legacy Boss maps. The maps are given as quest rewards, but for some you have to level up one Legacy boss to a certain point, before another boss' map becomes available as a reward from them.
For example, completing quest #62 gives you the Baramos map. Starting from Lv16 onwards, Baramos has an increasing %age change of dropping Murdaw's Map.
The orbs are rare drops from the Legacy bosses, you have to keep fighting them over and over.
Silver Orbs are dropped by a Legacy Boss, Baramos. Complete quest 62 to get his map.
You can't but you can make one @ dragon quest monsters.com
in the greenguard area, there will be places containing the greenguard bosses. the basilisk, the dragon and the deathgazer.i havent foud any others. yo have to defeat each of them if you want to finish the quest. you wont be able to do it alone
gittinghampalace
U have to fight him in warlic's quest(dragon egg)
oaklore dragon defend oaklore quest
nythrea's first quest you'll find it on that one
In Dragonfable you can find the mummy dragon in a quest called Dynasty Tomb in the Sandsea from Zhoom.
Go to below link and go to non-member quest and find dragon slayer quest. It is a good guide with screenshots.
You find them in high level 'volcano' grottoes.
you can get it from certain monsters