Gem spending on heroes pulls are not base on luck but gambling

Some of us never mind spending some penny to get their heroes. But when developer make hero pull base on luck its pure gambling. I play this game more than 6 month and i have spent more than 50 US dollar (For my countries its cost a lot) but till today i never had a single 5 star heroes . You as developer create TC 20 to give free player chances to pull 5 star heroes. But for spender such as me why make heroes pull base on luck. I hope in near future the developer will make heroes pull as confirmation heroes.

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