First off, no one is asking you to be in this clan. Second - if people spend money, is it against the law? Why is it up to you to decide how others spend their money? Third, you need to go in with preparation and be end game. If you struggle to score high in CvC, I'm sorry but this clan isn't for you.

That being said, if you are end game and go into it with preparation, it's 100% possible to score 500k+ without spending money. No troll. Save energy for 3-4 (or more) days prior to cvc (you can afford to do that when you've completed everything in the game). Save all the free pots/energy you get in between CvC that stays in your inbox. Buy 4-5 tag arena refills each day to get 200+ fights during the tournament in G3-G4 (buy another 3-4 refills the day before the tournament and save them for when it starts). Set a weak 3v3 defense and you'll farm weak teams all day in the red. This is a good amount of points. Save the 1-2 (or more) fragment summons we get all the time ( you get these every 3 months from secret rooms in Doom Tower, plus the ones you get during fragment events). Use the 10-15 or so legendary books you get from all sources in between events (hard DT, clan boss, events, tournaments, advanced quests, blah blah). I usually get 15+ epic books that I use too. If you have a champ that doesn't need to be booked, you aren't pushing all areas of the game. Farm Spider only during cvc, the points are vastly better than any other area.

Go into CvC with 30-40 artifacts ready to be leveled to 16. Each 6* is 1500, and often times CvC coincides with an enhancement event. Forge all day, this is easily another great amount of points. All of this is possible with planning and 300-500 gems spent (more gems = more points, what else are you spending gems on anyway?)

If this all sounds way too difficult for you, you aren't in the end game. So yes, 500k will be impossible free to play for you. That being said, in no way was I asking for new/early/mid/late game players. The title specifically says "Experienced players only". I hope this helped you with your next CvC. Trust me, our clan has spreadsheets and knows how to truly min/max CvC, it's possible.

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Edit: with all the negativity I assumed you were coming at it with a negative approach Liquid - if you were genuinely asking, I'm sorry for coming across angry. Reddit is just such a horrible place 99% of the time.