A4 is correct about the Quality of the Mossys Duurty Dragon.. A little out on the genetics.. Duurty, Black and Bobbys Dragon all share the same genetics... Jem x Affy x WhiteRussian x DeepChunk.. simple pheno selection with in the line created them all..
For the Portal Duurty freebies i followed a Black leaved pheno for a couple generations, purely because of the heavy grapefruit smell it gave off..
I too dont think you will be disappointed if you decided to grow some..
AS far as i am aware the only place to get Duurtys is the Portal.. Mumbling dragon(PAK x Duurty) and Double Dragon(Jem x Duurty)are also available as Freebies and will be until stock has gone..