If the Incarna of Towering Roots of the Jungle is destroyed in the middle of an action, do Invaders/Dahan/Beasts become vulnerable immediately?

If the Incarna of Towering Roots of the Jungle is destroyed in the middle of an action, do Invaders/Dahan/Beasts become vulnerable immediately?

• Ravage (without other effects): The Dahan are protected by the Incarna, since it was present when they were dealt Damage. But the Incarna is gone during the Dahan counterattack, so the Invaders take Damage normally.
• "Draw Towards a Consuming Void," "Drought," "Poisoned Land," "Pyroclastic Flow," "Pillar of Living Flame," "Volcanic Eruption": The Incarna is destroyed at the end of the base effect, so only the threshold can successfully deal Damage or destroy anything.
• "Insatiable Hunger of the Swarm": The Incarna is destroyed at the beginning of the power, so doesn't protect anything.
• "Cast Down Into the Briny Deep" threshold: The Incarna protects the Invaders/Dahan/Beasts in its land before being destroyed. Those pieces are then cleaned up for being in an illegal location.