Since Ziran's dial just went up it got me to thinking. If he uses multiattack to use two power actions to activate Planets Become Weapons twice and takes no damage next turn 2 damage is dealt to all opposing characters, correct? I'd say definitely yes but just wanted to confirm since it is a unique power that doesn't trigger until a turn later.

I don't see anything stopping that. Just remember that his power then deals 1 unavoidable twice, not 2 unavoidable at the same time. This is an important distinction for TAs like Fantastic Four and Suicide Squad.

I'm not sure this would be the case.

Planets Become Weapons: Give Ziran the Tester a power action. At the beginning of your next turn, deal 1 unavoidable damage to each opposing character if Ziran the Tester hasn't taken any damage since your last turn.

It is definitely possible to interpret this such that the damage is dealt twice. However, it is also possible to argue that it is a conditional which is fulfilled once, regardless of the number of times the power has been activated.

For example, we know that Eradicator's Reign of the Supermen trait only grants a +1 modifier to combat values, regardless of whether 1 Superman was KO'ed or 100. Similarly, we could argue that regardless of the number of times the power was activated, the condition occurs only once, and as such, the damage only occurs once.

it's incap that deals damage equal to the amount of tokens on a character.
but would stunning blow work for this as well?

so if target has 2 tokens when action resolves does target take 7 damage off of his 600 point dial?

and if he multi attacks?
thats roughly 14 damage being spread accross 6 targets!
sick!!

ziran is amazing gross, i can't wait to get mine!

Seems clear to me.
Turn 1 give the Power Action to activate PBW.
Turn 2 if Ziran takes no damage each opposing fig takes 1 click. Now give Ziran a power action to activate PBW again, he takes no pushing due to cosmic TA.
Turn 3 if Ziran takes no damage each opposing fig takes 1 click.

The OP is asking about multi-attack, though. If Ziran uses the power twice in one turn, then doesn't take damage, will he deal 1 or 2 unavoidable?

I don't think the Eradicator precedent applies here, as it's a one-time application of damage, and not a continuous modifier.

If he can use Multi-attack then sure. Not everyone can use the multi-attack ability.

Read Kyuzos post. Without clarification, I agree with him that it can go both ways.

I don't think it's quite analogous to multiple Supermen (Supermans?) setting off Reign. It would be more like if Eradicator could somehow copy Steel's trait, while keeping his own. In that case, if any number of Supermans had been KO'd, Eradicator would get +1 to CV's from "Reign of the Supermen (Eradicator)", and +1 to CV's from "Reign of the Supermen (Steel)", for a total of +2.

So if Ziran used Multiattack to use PBW twice, and didn't take any damage, on his next turn each opposing char would take 1 unavoidable, twice. As I see it.

Each power action is separate and sets up a separate condition. Each condition will trigger separately and independently. In other words, it will damage opposing figures twice. That's how I'd rule it. This is the exact opposite of the "Reign of the Supermen" situation, where there's a single condition that might have multiple triggers, but still only count once. Here you are creating two separate questions that just happen to be identical.