A Dragon

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The Death Curtain was a poor version of the Undead Calamity.

All living creatures within the Curtain's range would receive a continuous reduction in HP. Once their HP was depleted, they would quickly be transformed into undead.

However, the downside of this spell was that other than the HP deduction, the living creatures in the Curtain would only have their movement speed reduced at most. There were no other negative effects.

Even the health was being deducted at a very slow rate.

A strong Tier 3 creature could easily jump around in the Curtain for five to six minutes.

Matthew was only in the early stages of the field of " Undying."

However, after activating his Domain, he still received half of the damage reduction. On the one hand, this showed the transcendence of the Domain, and on the other hand, it proved that this spell was indeed useless.