...let's talk about all the good things and the bad things he can be.

I'm wondering if anyone here can break down for me how he works now that multi-attack has changed. I've seen some talk about how his 600 point version used to be played in conjunction with multi-attack and Manufacturing power, but not in detail. What's the optimal way to use him? How does he work?

His popping out sentinels is slowed now as he can't make the same free action twice in a round.

I've only played the 600-point version - which was fun! Regarding which sentinels to summon, I like to start with Omega Sentinels to slow the opponent down, until you can call stronger helpers. When you reach 75 on the Factory Dial, I'd bring in dofp001r Sentinel. At 100 points I'd consider dofp023r Sentinel Alpha 3, if you can't wait for the more expensive ones. At 150 the fun begins and enter Alpha Class Sentinel.

He can use 1 of his 2 actions to pop out a sentinel and one to move or attack etc.

Or he can use a DPA to use his advanced sentinel-pooping. This can't be used with Multi

Why could he ever use his special sentinel pooping twice in one turn? Are you saying he used to be able to do it once and then in the same turn do it again for a double power action?

Good to know he can attack AND use the special ability in one turn now.

A double power action is when you take a power action when you already have a counter from the previous turn, correct?

Multiattack used to allow the character to perform the same free action twice. But it was changed to follow the general rule of not activating the same effect twice with free actions ina turn.

No. A double power action is a power action that gives two tokens. You can't give a character a double power action if it has an action token.

Ah, I see. I was out of the game for some time and had no idea what a double power action was. Pretty sure I played that wrong recently.

So Master Mold can take two double power actions in 3 turns to use his 2nd special ability.

Reading over the rules and other comments...

Can I give Master Mold a Multiattack, use the first attack to use Sentinel Factory for free and the second to use Assembly Line for free all while placing one counter on him for the initial Mulitattack?

Yes no problem

No, you can not do that.

A double power action can't be given as a free action. So no Sentinel Assembly Line during Multiattack.

Sorry, I mislead. I was confused be the word "attack" in the sentence, thinking that the question was if one could make an attack and then turn the Factory Dial.