How do you breed 3 dragons?

[kmyfarmer]

A few goals telling me to breed say for instance " magic, green and blue dragons" but the breeding spot only allows me to choose between two. What am i missing here?

[awsumum]

Try magic on one side and Atlantis or island (both blue/green) on the other side

Or a dragon that's purple and blue (coral?) on one side and a forest on the other

Or poison (purple/green) on one side and water (blue) on the other

Altho if the goal says to use magic, try magic/island

Hope this helped :)