Can't seduce the Fury, right?

Seduction


Only usable as the acting vampire's action is announced.
Choose a younger vampire. That vampire cannot block this action.
As above, but you may choose a vampire the same age or older.


Unleash Hell's Fury


[2 Pool]

+1 stealth action. Requires an infernal vampire. Unique.
Put this card in play. This card may attempt to block a action against you and is considered a 9-capacity infernal vampire with +2 intercept during that attempt; if successful, the acting minion takes 1 unpreventable aggravated damage, and this card is burned.
As above, and untap this vampire.


Unleash Hell's Fury doesn't count as a vampire until after it has started an attempt to block. So Seduction can't be played on it because seduction needs to be played before the target tries to block. Or to be precise, it needs to be played when announcing an action and at that point in time Unleash isn't a vampire.

Correct?

Correct!

But I have another question regarding Unleash Hell's Fury. I think I make a new thread for that one.

Correct. Unleash Hell's Fury is a minion card, and not a vampire, in play when Seduction would be played.