User blog comment:Xeamnz/Lumenize! Armordragons Gamma Formation!/@comment-5480547-20140210105404

14+6+4+2+2+12=50

If I'm correct, you're missing one card.

The deck is normally composed of 52 (or more) cards. 50 (deck) + 1 (buddy) + 1 (flag).

The buddy you use in your buddy zone doesn't actually count towards the max in your deck.

Ergo, you can add a fifth Jackknife, or any extra card to make your deck actually follow the format.

You don't need to add a fifth Jackknife, you can add any other card, but the cap is still 4. It's only 5 if one of them will be in your buddy zone.

^-^