Necrites killed Jherana Rure, ending the counterinsurgency.

Masters Edition II

Necrite

Whenever Necrite attacks and isn't blocked, you may sacrifice it. If you do, destroy target creature defending player controls. It can't be regenerated.

Fifth Edition

Sacrifice Necrite: Bury target creature defending player controls. Use this ability only if Necrite is attacking and unblocked.

Necrites killed Jherana Rure, ending the counter-insurgency.

Fallen Empires

If Necrite attacks and is not blocked, you may sacrifice it to bury a target creature controlled by the player Necrite attacked this turn. If you do so, Necrite deals no damage during combat this turn.

"Ever see a wall drop dead of fright, kid? It ain't pretty."
—Cpl. Dobbs

Was it the sight, smell, or aura of the Necrite that killed so effectively?