basically, its a pillar for duo/trio decks (cuz no1 uses them now, every1 use rainbow :S)
I greatly beg to differ.
Many months ago, that was the case. Rainbows were everywhere and very popular, and was hard to beat.
These days, "every1" have at least tried a good old duo, maybe even a trio. Recent updates have given more and more new cards that duos benefit the most out of. (For example, fractal makes many, many new deck ideas and even spawned a deck that could kill FG's, RoL/Hope. The Steam Machine encourages Water/Fire duos. The dune scorpion encourages time/gravity duos. Pendulums help many, many duos by giving them smoother draws.) In fact, I like how duos are becoming more and more dominant with each update, and they are almost on par with, if not greater than, rainbows.
That said, I don't think a card like this is necessary at all. (this will make duos even greater than rainbows, possibly) We need something for
monos. I mean, true monos, with same mark, are extremely rare nowadays - even monos with a different mark are starting to lose popularity (the classic shrieker rush is slowly getting "outrushed"). Maybe pillars that give 1.5 quanta rounded down (1 pillar = 1, 2 pillars = 3) - you cannot have any cards that are not the same element?