RPG Maker Forums

I have a somewhat convoluted final boss battle in mind. I'm not quite sure how to event it properly though.
If anyone is familiar with the Miracle Matter battle from Kirby 64 they will kind of know what I'm aiming for.

Basically the battle would consist of the boss cycling through 8 different elemental forms.
In each form the boss would only be vulnerable to damage from the opposite element. Example. Fire form would only be vulnerable to ice type attacks. Once that form is destroyed it would randomly shift to one of the seven other remaining forms,
until all the forms have been destroyed. Only then will the true final ninth form appear.

I have everything figured out except the Random Element.

I have Nine different enemies for the final boss. A battle event triggered when the first form hits 0 HP. Transform Enemy via random variable to one of the seven remaining forms. This is where it gets complicated for me.
I don't know what it will transform into. So I don't know what remaining 6 forms to put into another random variable for transformation once the second form hits 0 HP.

I could do this if not for the Random Element, but it's something I really would like to keep in if possible.

The only thing I can think of is a conditional branch for every single possible outcome across all 7 transformations.

Is there a simpler way or should I just stick to a fixed transformation schedule?

EDIT: Hmm. Actually even with fixed transformations the boss only seems to transform into the second phase. Once that hits 0 it just repeats the 1st transformation so I'm battling the second form on an infinite loop.