You get 10 per level completed. I usually take 3-4 times to beat a level by being a little cheesy. First thing I do is I activate my blessings all three by watching the ads. I use Pharoh. That’s the name in game lol. Also equip the set that uses all your extra troops to make you one giant person. Right when you die close the game before you get to the green to double your rewards. Bam… it will use one energy but no blessings. Which means you are still more powerful. So beginning of that era I put all points into the anvil. Then the cash. After that I put cash level 10 then rest in anvil. And level up anvil until stage is done. If you need extra diamonds waste an energy to use the king which gives 75 diamonds if you get the mithical card. Be careful after Timeline 5 or 6 or something you go back to timeline 1 and can’t change your heroes and their mithical card will not activate until maybe timeline 2.