Hmmm, ok you win 2:0, but try to think as me.
There is written:
Special Rules
Its Halloween! Only the elements
and
are legal. Your mark must be one of those elements.
No shields.
Upgraded cards allowed, but not required.
There is no written this:
You must use CARDS FROM THESE ELEMENTS.
I thought this: only one from these elements must be used like mark. No about cards from these elements.
By myself, i think rules were written very bad.
GL in tournament.