Or some other clumsy latinised nonsense.
So, seems the new book is bringing new toys and abilities, including being able to much about with Daemons if you're a Psyker.
Given the general omnipresent nature of the Warp, and the risks of being a Psyker in the background, this isn't exactly against the background.
But....Ezekiel summoning a Bloodthirster? Just doesn't seem quite right to me. I see no reason why he couldn't summon a Bloodthirster, but I just can't get my head around why he would summon a Bloodthirster, or indeed any of the other Pantheonic daemons.
Yet.....we also know Daemons take their form from the expectations of Mortal minds... And we also know there are many more Gods in the Warp than just the big four. And let us not forget, the vast, vast majority of the Imperium is singularly ignorant when it comes to Daemons and Gods etc.
Now, put those things together, and what is stopping you from converting up or scratch building something a bit more stylistically fitting? A Daemon sure enough, but one whose form is heavily influenced by the expectations of the summoner?
Let's take Orks. Big gribbly Chaos Daemon? Doesn't really suit. But...[url=http://www.forgeworld.co.uk/Warhammer/ORCS_AND_GOBLINS/ORC_ROGUE_IDOL.html]infusing the surrounding battlefield debris with sheer Orkiness to the point where it gets up and fighty?[/url]....that I can see!
Dark Angels.....they're kind of suspect as it is. Now, imagine one of [url=http://www.forgeworld.co.uk/Warhammer/Warhammer_Monsters/MOURNGUL.html]these bad boys[/url], with a green stuff cowl?
Long as you're using existing rules, and reasonably sized model, you can work your way round the stylistically odd.
For Blood Angels? How about some kind of super sized Sanguinor type? A blazing angel, rather than something evil and gribbly?
Any other ideas?