Pressing Flesh

I had trouble to figure out what you meant by "burn description", so I scratch my answer and start it again:

There's only one rule involved here, that is the requirements to play a card.
For War Ghoul, the requirement is "Tzimisce" (and nothing else).
For Pressing Flesh, the requirement is "Thanatosis" and having a legal target when you play the card.

The War Ghoul has an effect "when it enters play". It can enter play through different means, it doesn't matter. It's not a requirement, it's a plain effect that triggers.

If you control no other ally or retainer but the War Ghoul, it burns itself.

It it had been a requirement, the card would have mentioned something like "Requires another ally or retainer you control.".

Or, if it had required a target, something like "Choose an ally or retainer you control. When War Ghoul enters plays, burn the chosen ally or retainer." But it's pure speculation here.

If you manage to put a Vessel in play not by playing it from you hand, it could burn a Blood Doll the same way the War Ghoul burns an ally or retainer you control, though in the case of the Vessel, it's beneficial, whereas it's detrimental in the case of the War Ghoul (unless you want to burn the Charnas someone played on one your vampire, but that's cornercase).

Thetmes wrote:

Hello folks!

Just a question:

i i play pressing flesh on an unique ally, would he still be unique after?

as pressing flesh states it becomes only a zombie instead of what it used to be?

Pressing Flesh, Action, Thanatosis:
+1 stealth action.
[thn] Choose an ally that was burned from play. Move that ally from the ash heap to your ready region with this card and life equal to its starting life. This ally is a zombie instead of what it used to be, gets -1 bleed, cannot gain life, and may play cards that require basic Fortitude [for] as a vampire.
[THN] As above, but with an additional life.

It only changes the type, not the uniqueness.