Ok, so I just now realized that the attack modifiers (i.e. 2.5x attack for 2 turns) modify the attack of cards if they are dual element and their secondary element is the same. i.e dark/blue is modified by 2.5x water based elements.
does this work with the passive modifiers too? i.e. 2.5x hp and attack water element cards would modify a dark/water element card as well as a water/dark card?