Can you untap an untapped vampire/minion?

Is it possible to untap untapped minions?

For example, can I use a counter from Under Siege, just for +1 intercept for an already untapped vampire?

Under Siege
[Action] Action

[1 Pool]

+1 stealth action. Unique. Requires a titled Sabbat vampire.
Put this card in play with 3 counters. Once each action, a Sabbat vampire you control can burn 1 counter from this card to untap and attempt to block with +1 intercept, even if intercept is not yet needed. Burn this card when it has no counters.

Yes, it is possible to untap an untapped minion.

Examples: You can burn 1 pool to untap untapped Cybele (she's Infernal) during your untap phase.
You can play Freak Drive at superior, after being blocked and playing Majesty in the resulting combat.
Eze would untap twice on successful a Big Game action against a Red List minion.

You can burn a counter from Under Siege to give an untapped Sabbat vampire +1 untercept (even if intercept is not yet needed), and that vampire attempts to block.

Can I play second tradition and burn a blood, even if I am already untapped?

Sorry if this is obviously, but the english is pretty confusing in this card.

thanks.

No because the burn blood to untap part is only usable by a tapped vampire.

Charles_Bronson wrote:

Can I play second tradition and burn a blood, even if I am already untapped?

Sorry if this is obviously, but the english is pretty confusing in this card.

thanks.

The card basiaclly says:

Second Tradition: Domain
[Reaction] Reaction

Requires a ready prince or justicar.
+2 intercept. Also usable by a tapped prince or justicar, even if intercept is not yet needed, to burn a blood to untap and attempt to block with +2 intercept.