Dagruel completely immune to Ruminas' Death Blessing.

「Looks like you're the one who is naive!」

With the sweet scent of roses, a red streak of light flashes and makes contact with Dagruel's head.
From there, descended a silver haired girl.
Wearing a jet black dress, with gold and silver heterochromic eyes which show her shining resolve.
Demon Lord Ruminas.
This was the very moment the ruler of these lands joined the battle.

「Hmph. People like you, usually show openings at the moment of triumph.
As it was a problem for me to break through your defenses, I was observing the situation and letting it pan out waiting for my opportunity.
Looks like you were careless, Dagruel.
Don't think too badly of me, and take a little nap there for the moment.」

As she has said herself, Ruminas has been observing the situation from the very beginning.
She understood that her chances of victory were low, if she were to face Dagruel head on.
Ruminas properly understood the limit of her own abilities, so she didn't think her actions were underhanded.
To fight the battle which she knew she could win. That was her way of life.
She unleashed her most devastating attack, on the careless Dagruel.
As Ruminas was someone who had access to an ability which controlled life and death, it was an attack that had the full intention of slaying her foe.
Which was also why――

「Fumu. So it's Ruminas, huh. And you are right, that I had been careless.
But, could you really say that has been a problem? Did that attack actually damage me?」

Those words caused her to freeze up.
Ruminas was a knowledgeable being, she properly understood what those preposterous words meant.
Which was that Dagruel was unharmed. This event, manages to prove a single fact. That――

「Are you all done now? Now then, it's my turn next.
Brace yourselves! Or it will be over in an instant!!」

As they have not been able to defeat him even with Ruminas' attack, it was a fact that Ruminas' forces would be unable to attain the victory.
---
‘This might be impossible――’
That’s the honest impression of the Demon Lord Ruminas Valentine.
Her plan was to kill Dagruel using her strongest technique in the first attack, but it had no effect.
With Death’s Blessing, the life and death reversing technique, Dagruel should have died.
However, the result was that the instant death effect was nullified, and Ruminas’ secret technique was defeated.
At that time, Ruminas was able to partly foresee that thing would proceed this way.