Alright sure. Your grandmother was a jungle dragon. I would appreciate some world-building help. Just PM me the details.
"Uhh..." Revi looks at Vellelu @Spark of Hope
Umm... Secret plot reasons that I'm saving for arc 3 now because I just invented them.
"Ice." Revi finishes. "Impressive." That's more dragons documented than all but one human I've met."
Fine, you glimpsed an Ice dragon once. You know it was different but have incomplete sketches of it.
Explain your idea for what hybrid is. And yes, basically.
Hmm... Lets see
Mountain dragons: Most common in temperate mountainy places. Revi is one
Sand dragons: Most common in extensive deserts. Sandstorm is one; you have likely seen this type of dragon on your travels.
Water dragons: Mostly in the ocean but also in large rivers and lakes. They are quite reclusive, but you've probably seen one or two.
Ice dragons: Way far north. It is simply too cold for the current technological level to reach these cold temperatures
Jungle dragons: In the jungle or rainforest. If you've seen one and aren't a dragon, you're dead.
Sky dragons: Live on magic clouds. Impossible to get to unless you can fly.
Breif overview of six dragon types
How on Earth has he seen 70% of the planet?
Consider this to be similar to the world map proportionate to Earth. A single continent that is similar in size to Europe.