Adding Activation to a multi-effect power

[Bombaatu]

I'm trying to model a character like Captain Marvel: one power containing multiple effects, all with the Activation flaw. But... I cannot see a way to add Activation to Multi-Effect.

Am I missing something? How do I model "i have to take X action to activate ALL of these effects at once."?

[JDRook]

The Alternate Form "effect" is actually a container that functions exactly like the Mulitple Effect option plus an Activation pulldown at the top, which should be just what you need.