Advent Card question.

[Dark Kabuto]

What was the purpose of the "AP" that was listed on the cards? It didn't seem to effect which card could be used when on the show, so what was the point of them?

 

[Chronotia Archzenom]

I think in short, this is like Kamen Rider + Yu-Gi-Oh! Duel Monsters.

 

[MetalSymphony]

To indicate Power Level's.
I think.