@VFROOD , do you play HayDay? Knew a Vfrood there.
The summons lottery is very disappointing. Specially the epic hero summons. It is marginally better to do elemental summons, and specially summons during events, which happen once a month, usually on the second thursday.
I do not know when you started playing, but getting a 5* early on is not as rewarding as it seems, as it will be a long time before you have the mats to ascend it even to the 3 rd tier. I did get one, early on, and only 6 months later was I able to ascend it to last tier. The best way to go on with the game is to proceed with 4* heroes. They can be more useful at times. Last vent, for instance, I finished advanced with only one 5*,and no problems at all, whereas some friends with an all 5* cast had to try at least 3 times to finish it. One of the most intriguing aspects of this game is to balance the specials to maximize your hit points. There are plenty of threads in this forum with advice about it.