I rate Rageki on a 5 (who wouldn't) because if your in a five on one showdown and use this baby, it will wash all their hard work away as you laugh at them while you attack their life points. To bad you only can have one in your deck which is probably all you will be able to find.
 
 
 

I rate Lengendary Sword a 2.5 because it only powers up a monsters attack and defensive points by 300. It could be helpful in a tight spot but only if its a 300 point difference. Their are better magic cards than these so put it in your deck if you can't find a better one.
 

I rate Forest a 3.5 because it does power up your Battle Ox by 300 points but that is about the only one that is worthwile in the level four and under category. You could try better terrain cards like Yami and Sea. Put it into your deck if you can't find one.