Wasn't this mechanic named 'potent' a while ago?

I'm not sure on the wording here - is this supposed to only get the bonus on the turn you get the fourth one? Or is it meant to be "While you have..."?

I'm also not really sure how easy it will be to reach this threshold (and yep, using that term deliberately), so I'm not really sure how much weight to give it in terms of balancing. But this feels like a pretty small advantage for something relatively hard to do.

Maybe i should lower it to 3. i want them to keep it if you have the right spells in graveyard. but im sure it should be less so you can mix creatures with spells. I changed the name and might changed it again to make it named after what it does. maybe potent was a better word.

Don't know which is the better word; just checking it was meant to be the same mechanic.
The "Until end of turn" is the wrong wording if you want to keep the bonus going.

@vitenka you are right it should be end of turn. i think lowering it to 3 might be the right thing since the cards are pretty balanced for what they get.