I have being thinking about second game event (Emo's New Moon) and came to a conclusion that things will get not that much exciting if this copy-pasting will continue. I know its still a hard work to make a new sprites and campaigns, but i would like to suggest some really big feature, which will improve all of the further events and give a good head up for upcoming features.

As we all know, there will be Idol Shop where players will be able to spend their hard earned idols to buy some upgrades. What i would like to see is some kind of upgrades requirements system. For example, the first row of skills may cost us just some idols to unlock, but the next one should require a new idols type - Emerald Idols. How to obtain those? Well, there could be few ways.

The first way to obtain Emerald Idols - Events

The event system stay as it is... But, there could be a special button, lets call it a 'Hard Mode'. It means you will attempt to beat the same event under hard condition: idols you have earned will bring you no bonuses. That means only your items will do the job for your heroes. The reward is one extra special chest for every mission beaten during event (including endless).

So-called 'Emerald Chest' and 'Jeweled Emerald Chest' will contain special items, which are unique - can be received in 'Hard Mode' only, but during any event. Emerald chest rewards 3 cards. First card is always an Idol Card: gives 1/2/4/8 idols (depends on card rarity). Second card is Emerald Card: gives 5/10/20/40 Emerald Idols. Third card is Mutation Card: gives random mutation buff.

Mutations are special conditions which can be activited DURING the world reset. With those buffs activated you will change the way you play into something new, fresh. Those are permanent cards, means once unlocked - they will stay with you forever. Only one mutation can be active at a time. Example of mutation buffs: your next world will give you +25% extra Gold Bonus, but the cost will be 5 Idols. If you will get second card of the same type (lets call it Gold Mutation), then its level will improve. For the next level it gives: +50%/+75%+100% etc gold. After some level it may also reduce idols cost to summon it by 1/2.

The other example of mutation, the exciting one 'Clicking Mutation' xD: you will have no DPS damage active - only Bush Whacker will be able to deal damage, but the damage of Bush Whacker will get +5% extra dps from any hero presented on battlefield. Note, heros still do give buffs to eachoter improving their passive DPS, it just dosnt do autodamage on its own. The Bush Whacker still may steal 5% of dps from near targets to improve his damage and it may be still a wise choise to get those heroes nearby as strong as you can make them.

The second way to obtain Emerald Idols — Exchange

Player should be able to get Emerald Idols outside of events. There can be special button to exchange them for normal Idols. Five normal idols will give you 1 Emerald Idol. Also there should be a note, that normal idols will dissapear completly after being exchanged, making it a bit better to use events to farm Emerald ones.

Also there should be gold exchange. How it works: for example, the first Emerald Idol will cost you 1 million coins; the second 10 millions coins, etc. The price should go up more and more, while remaining the same even if you reset the world. This means player can get an extra Emerald Idols, while simply going further through campaigns. The more gold you get, the more of those you will receive.

The third way to obtain Emerald Idols — Emerald Campaign

There may be special campaign to get Emeral Idols. The condition to enter is: any player can enter only between saturday and sunday. Rewards are simple — after every boss (5 levels of campaign) you are getting 1 Emerald Idol. The campaign progress resets every week, which allows to get more E-Idols. You do not get idols for playing campaign again during the same week (reseting), so you cant get E-Idols from already beaten bosses.

There may be additional quests in this campaign, with requirements of having xxx-xxxx normal idols to enter. Only one quest can be activated durin one week. The better the quest is, the bigger are rewards. This means high level players (those who play longer) may get better bonuses.

E-Idols itself will give no benefits to your heroes, their only purpose is to buy upgrades in Idols Shop (which isnt implemented yet). Then you can simply add few new Idols types and few rows of upgrades in a Shop. This also means you dont have to release full shop upgrades system at once and can do it slowly, grade by grade.