User blog:Glowpixels/Question regarding season 3 heroes

Hello, returning player here, and I've been wondering about all those 3 stars arcanas we keep receiving on part three and can't even limit break. Should I keep them, do they have any purpose. I tend to keep all limited editions card even if they are mediocre, however there's just too much of them. In other words, is it safe to throw the free 3 stars card, that we get for free and can't limit break, away?

Thanks

Glowpixels