Ex Nihilo can I choose to burn my minion?

Ex Nihilo
Type: Action
Requires: Necromancy
Cost: 1 blood
+1 stealth action.
[nec] Put this card on this vampire. This vampire gets +1 stealth. Damage he or she inflicts in combat is reduced to 0, and he or she is immune to non-aggravated damage. This vampire cannot gain blood; any blood he or she gains goes to the blood bank instead. During your master phase, this vampire burns 1 blood or is burned. You may burn this card during your untap phase.
[NEC] As above, but you may burn this card during any Methuselah's untap phase.

If the vampire with ex nihilo has plenty of blood but I want to burn it anyway because it's equipped with a soul gem of etrius, am I allowed? Or does the option only exist if the vampire is out of blood?

Agamemnon wrote: Ex Nihilo
Type: Action
Requires: Necromancy
Cost: 1 blood
+1 stealth action.
[nec] Put this card on this vampire. This vampire gets +1 stealth. Damage he or she inflicts in combat is reduced to 0, and he or she is immune to non-aggravated damage. This vampire cannot gain blood; any blood he or she gains goes to the blood bank instead. During your master phase, this vampire burns 1 blood or is burned. You may burn this card during your untap phase.
[NEC] As above, but you may burn this card during any Methuselah's untap phase.

If the vampire with ex nihilo has plenty of blood but I want to burn it anyway because it's equipped with a soul gem of etrius, am I allowed? Or does the option only exist if the vampire is out of blood?

Ex Nihilo can only burn empty vampires.

Agamemnon wrote: If the vampire with ex nihilo has plenty of blood but I want to burn it anyway because it's equipped with a soul gem of etrius, am I allowed? Or does the option only exist if the vampire is out of blood?

Pack plenty of Minion Taps or Villeins and the problem is solved.

Pascal Bertrand wrote: Ex Nihilo can only burn empty vampires.

Is there a part of the text that indicate it ? Or it is a ruling ?

Ohlmann wrote:

Pascal Bertrand wrote: Ex Nihilo can only burn empty vampires.

Is there a part of the text that indicate it ? Or it is a ruling ?

This is a ruling.