Nether and Ice dragon are two new skins for the mod, it's just cosmetic changes and they're not affecting the gameplay.
You can tie a dragon to the fence using lead, they are flying around randomly, so it will make the taming process much easier.
How to install addons:
- Download ES File Explorer
- Using ES File Explorer go to the Downloads folder on your device
- Find .mcpack or .mcworld files that you download earlier
- Click it to import into Minecraft Pocket Edition
- Open the game
- Create a new world or edit an existing world
- Scroll down into Add-ons section and select the ones you want to apply
Reason: Added two new skins: Ice and Nether dragon