I need help with a dificult OCG problem

[Nelsn3]

Alright, so I get this idea for a really good card and then I can't find a good picture for it, days later I find a pic thats good enough but I botch the OCG hella bad. Any help you guys can give is definitely appreciated.

 

OCG- "Destroy all Spell and Trap Cards on the field other than this one. Combine the Attack Points of all your opponents monsters and then select 1 of your monsters with half or less of the combined Attack Points to attack with. Apply Damage Calculation normally. All monsters on both sides of the field that have been involved in damage calculation are destroyed during the End Step of the turn."

[Larxene]

I'm no expert, but I do know it should ATK instead of Attack Points

 

But Browarod is the expert from what I know, try asking him, or someone else

[Saturn of Elemia]

Lemme see if I can help:

 

When this card is activated, destroy all Spell and Trap Cards on the field. Increase the ATK of 1 face-up monster on your field by the ATK of all face-up monsters on your field. Destroy all monsters that were involved in battle during your End Phase.

 

The card is OVERPOWERD as all hell. There is a card that is similar to this in Japan, except that it only increases ATK and the monster you select does no damage.

 

This REALLY needs balance. It is FAR too powerful.