Timing on Entomb

A quick reminder about the card text before my question:

At the start of the villain turn, Akash'bhuta deals all non-villain targets (H) psychic damage.

If all active heroes take damage this way, destroy this card.

Does the second sentence constantly check to see if the condition is being filled? That is, if all of the heroes take damage this way, does Emtomb get destroyed before it can do damage to other non-villain targets (like golems or all of our ongoings and equipment when Imbued Vitality is out)? Or does it damage everything, then check to see if it happened to damage all of the heroes?

The general way to read cards with multiple steps is look for a Coma or a Period

If it is a coma, the steps happen simultaneously

If it is a period, then they happen sequentially.

SO with Entomb, Every thing is damgaed. After all the damge is delt, it checks to see if the destruction condition was met.

And then it stops. It's basically a check of "Did someone wuss out and avoid the damage by being immune or amroured? Ok, we'll try again next round."

Thanks. That's how we played it. But, I wanted to make sure. I know that some effects are always on. So, I wanted to make sure.