This guide is a brief overview of the dynamics of the game.
This guide is based on a guide written by jooe15 over on the Kongregate forums but was not updated since 2014.

Quest

The Quest tab is a place to fight battles, every normal battle drops Disciple cards, gives xp, Soul coins, Captus, and more. There are four continents, on each continent their are four domains, and on each domains there is 5 battles the last of which is a boss. Battles cost Hope.

After you finish all battles on the first continent you unlock the second continent and after you finish all battles on the second continent you unlock the event area and a special map called Hellforge. After you finish all battles on the second continent in Hellforge you unlock a new area called Isla Mare.

Hellforge

Hellforge is a mode in which you can fight battles for equipment cards instead of Disciple cards, from here you can click to go back to normal mode. Hellforge is also the place to find Convert Runes, and items used to upgrade equipment.

Isla Mare

Isla Mare gives currency for evolving four star cards to five star cards; it has four regions. If a disciple dies in Isla Mare it is dead (in Isla Mare) for the rest of the day. Isla Mare has its own shop with ten items. If a item slot is not open you can open it for 100 Isla Mare coins, these slots stay open forever.

Event

Events take place over the course of one week, like a stage it has four regions. Event cards are very rare and hard to come by. You will get rubies along the way as you try and get the card.

Arena

Arena is PVP and resets 00:00 UTC (Midnight). You can do ten battles a day, more if you pay. Each win gives out arena coins, depending on how many wins you have gotten without a loss. Arena has its own shop with ten items. If a item slot is not open you can open it for 100 Arena coins, these slots stay open forever.

Captus

Captus is a mini-game of sorts. You can open a Captus in the Captus tab. Captus give cards depending how well you can match cards with each other.

During the Tutorial, around the time you reach lv5 the game will ask you to enter a code or "you can enter it later". It doesn't tell you that 'later' is until you reach Lv6 in which case the prompt is gone forever!


Just enter;

A3CEJ5QM

You can also paste it in. You will then receive a message telling you to claim your free summon.
Remember however that as soon as you Lv up, the chance to do this is gone!

Social

This is a place to add, delete, view or invite friends as well as redeem codes and check your mail. In the invite friend section there is an invitation code which allows players to gain rewards.

Redeem codes are passed from dev to player, These codes are often longer and hyphenated.

Disciples

The Disciples Tab is a place to upgrade, and evolve cards. Here you can equip items and devil blood to your cards. The Disciples Tab is also the place were you can swap cards in your deck with cards in your inventory. A red dot in the corner of a card means the card can be upgraded,evolved,equipped or the Equipment can be upgraded at the given time. To swap cards in your inventory click a card, and then click swap.

Skills can be upgraded by clicking the card and then clicking the skill tab. Each card has a certain amount of skills depending on the amount of stars the card has. Skills are unlocked by leveling up the card. You can only have three skills active at a time. When you click a skill it will say “Equip” under it if it is not currently in use. To upgrade a skill click the skill and click upgrade, this will cost you Soul coins. Each skill has a maximum level of 10.

To upgrade a card, simply click on the card and click on upgrade. Upgrades consume other cards. The higher the rarity of the card sacrificed the more XP it will give:
1 star: 10 xp
2 star: 30 xp
3 star: 60 xp
4 star: 100 xp
If a card is leveled it will also give one more xp per level.

Devil Blood

Devil Blood are items used to permanently increase a cards stats, there is a maximum Devil Blood limit you can use on any given card per attribute. To use Devil Blood click the card you want to use them on and click Devil Blood. There you will see a list of all the Devil Blood you have and can use.

Evolve

Cards can be Evolved and this allows a card to have higher maximum attribute points. A higher level card can also unlock more skills. When a four star card reaches level 25 it can then be nightmare evolved to make a 5 star card. To evolve you need two cards with identical names. To evolve a card click the card, then click evolve. This will cost Soul coins. Note: The card you click evolve on will be paired with one random card in you inventory with the same name.

Equipment

Equipment cannot be taken off a card, however you can overwrite it, this essentially deletes the old equipment. Equipment unlike other cards cannot be evolved. Equipment is picked up from Hellforge in pieces. It takes X amount of pieces before you unlock the item itself. To add Equipment to a card click the card and then click Equipment. Click the Equipment you want and drag it or click it and press equip. Equipment enhances stats of a card, and sometimes they even have their own skills. Equipment can be upgraded with materials found in Hellforge. To upgrade Equipment simply click the Equipment and click Upgrade.

Exchange

Exchange is a place to switch 5 three star cards to 1 four star card. 5 three star cards and 50 Convert Runes will make one random four star card. Convert Runes are a common drop in Hellforge.

Summon

The Summon tab is a store that uses a variety of currencies, but all rewards are cards. To see other store items click the Quest tab and Store in the bottom left.

Royalty

Royalty a tiered paying system. The more you pay (real money) the higher you Royalty becomes. There are fifteen levels of Royalty each with their own benefits. The Royalty tab can be viewed in the bottom left of almost any page.

Tier 1 requires only $1 and is widely considered a good investment as it provides 1 extra training slot for skills in addition to other perks.

Hope

Hope is used for all battles in the quest tab with the exception of raid bosses, Isla Mare and PvP. One Hope recharges every five minutes. Hope cap increases depending on your level. Everytime you level up your hope completely recharges. You can buy hope refills (50 Hope) for gold (50 Gold) when you run out. Daily rewards also give 2 free hope refills (40 Hope) every day.
It is worth nothing that if your Hope is full and your daily hope refill is charged, you can use it and your current hope will increase over your maximum cap. Using this method you can stockpile Hope.

Gold

Gold is an elite currency gold is the only currency you can buy with real money. $1 USD can be exchanged for 100 gold (more if you buy in bulk). Gold can be used for most things in the game including, but not limited to, maximum inventory size increase, maximum friend amount increase, maximum skills that can be leveled at once, upgrading skills, cards, and refills. You can earn free gold every day you login.

After Logging in for 7 days in a row on the 7th day onwards you will receive a random 'prize' which is usually of lesser value than 50 gold or you may recieve 100 gold.
You can reset your Login bonus by simply not logging in for a 24hr period (UTC time) and you will start again from the beginning.

Soul Coins

Soul Coins are secondary currency. Soul Coins cannot be used for as many things as gold, but it still has a large variety of uses. Soul Coins can be used to upgrade skills, upgrade cards, and evolve them. Soul Coins cannot be used to buy cards.

Honor Coins

Honor Coins are obtained by doing well in the arena. Honor Coins have their own separate store called the arena shop these items cannot be bought with any other currency and this includes gold. The arena shop has ten random items every day which range from rare cards, to devils blood and to equipment.

Virago

Virago is a currency much like Honor Coins, they are obtained by doing well in Isla Mare. Virago, like Honor Coins have their own shop devoted to them, and once again no other currency can be used.
You can earn upto 1399 Virago per day.

Crystal

Crystal can be found when friends use you in battle, when you do well in a Raid boss, or Arena. Crystals have a very limited use, one thing, Crystal Summon. Crystal Summon will give one rare or above card for 600 crystals.

Golden Tickets

Golden Tickets are used for one Premium Summon. They can be found by doing well in most events, this includes World Boss.

Rood

Rood is a raid counterpart to Hope. Rood has a much smaller maximum and you cannot increase its maximum. One rood recharges once every thirty minutes. Rood can be used to fight raid and world bosses. Rood, like Hope will recharge once you level and like Hope, Rood can be refilled by paying gold. Another thing about Rood is you can decide to use different amounts of it at one time. One Rood will do 1x damage to a boss, two Rood will do 3x damage to a boss, and 3 Rood will deal 7x damage to a boss.

Battle Scrolls

Battle Scrolls can be bought with gold or found in battles. A battle scroll can be exchanged for five extra arena battle attempts.