Crazy that I just copied demo test and pasted this. Anyways, make a Boss that will attack your potion, that's it. Just one Boss only! And you should also remove that other boss. Recommendations: The Boss should follow the themes of "Fantasy," this includes the enemies it summons. The Boss needs to also leave when the potion spills. Boss HP should be around 40-70 HP. Optional: Have some enemies spawning when the boss is there. You can make your own ingredient, BUT it needs to have the themes from THAT boss!
Heavily inspired by @RossSprites for the scratch game called: Protect S.A. HQ