Question: Help needed with Dragon themed aquarium for axolotl

[melvin2002]

Hey there people!
I have two axolotls, a leucistic and a wild type and the leucistic is in a different aquarium for a while since the other one bit off her front leg.
She's about 12cm/7 inches and lives in a tank with 30x22x15 proportions (in cm) and I'd like to give it a cool theme, because it's a little bit plain.
I was thinking about making it dragon themed, I've already put in a few playmobil bones to make it look like a dragon's den, I would like to hear your sugestions. What substrate would look good, how many plants should I put in and do you have other cool ideas to make amanda look like a fierce lil' dragon?

 

[melvin2002]

I was thinking about making a stack of coins, would they rust in the water? would it have effect on the water quality? And what substrate would look good in the tank I'm planning?
what plants should I use?

 

[Blackbun]

Coins made from alloys could leach copper into the water which could become toxic.
As for dragon themed aquaria decor, you can get some good ideas using a web image search.