Sirrush, Mushussu, Ishtar Gate Dragon, (Dream)

Heavily based on my dream Dracosaur, the head has been remade to resemble more that of mythical animal. 

I picture it hunting in a unique way as no predatory animal ever used horns; Sirrush would be a very fierce predator fearless even when facing much bigger opponent (imagine a reptilian wolverine... with horn). It's plated protects it from counterattack of such formidable opponents while long and durable horn allows causing deep, piercing wounds. The creature uses hit-and-run tactics, waiting for the prey to bleed or die from internal damage done with one or two stabs with it's dagger-like horn.