I wanted to finish Portal Event Act 1 without using gems 😥

It's been a little over 3 months since I started playing Merge Dragons, and my Dragon Power has surpassed 50,000. Every time I play 'Shining Day', I end up increasing my Dragon Power by thousands... As my Dragon Power increases, the game's difficulty keeps going up. They're no longer giving out the potions you get for watching ads for free 😡 You have to finish the Portal Event within 12 hours of it opening to get extra legendary rewards, but since they're not giving out potions for free... I almost gave up on the legendary rewards, but with 5 minutes left, I just spent 50 gems to buy a potion and finished Act 1 lol Now that I'm over 50,000 power, a new kingdom has opened up, and I'm scared to even look at it. I'm already stuck in the merge swamp, and falling in deeper will be tough ㅋㅋ