[Souryuu(双龍)] Treasure of Curse [2009-12-21][DTG-TF]
From:
[2D Dream Comics(二次元ドリームコミックス)] Toushin Engi (闘神艶戯) - Vol.05 [2009-12-21]
Code:
https://www.sendspace.com/file/9ipq36
I guess this counts as an evil water/slime doppelganger TF, could swear I saw this on some anime.