War Machines

War machines are unlocked by the Engineer and fight in Battles against enemy war machines and in the Arena of Kings against the war machines of other players. Your battle formation consists of up to five different war machines which have individiual powers. Each war machine in your battle formation can have a crew of up to five heroes whose jewels boost the attributes of the machine. War machines can also be upgraded by the Engineer with the help of expedition tokens, blueprints and components.

## Attributes

War machines have the three attributes damage, health and armor.

Each war machine has different base attributes. The base attributes can be increased by leveling up the war machine, by leveling up the Engineer, with blueprints, with sacred cards, with ancient artifacts and with the crew of the war machine. The basic attributes are given by the first five effects:

> *basic attribute* = *base attribute* \* (1 + *level bonus*) \* (1 + *engineer bonus*) \* (1 + *blueprint bonus*) \* (1 + *sacred card bonus*) \* (1 + *total artifact bonus*)
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Thereby, the total artifact bonus is calculated multiplicatively between different artifacts. The battle attributes, which are the attributes used in the warfront campaign, also include the total crew bonus:

> *battle attribute* = *basic attribute* \* (1 + *total crew bonus*)
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Each war machine also has a specialization (damage, healer or tank) and special ability which has a 25% chance to trigger after each attack of the war machine. Healer machines also heal the foremost war machine in your team for 200% of their own damage in each round. Each war machine also has a special milestone effect (one of All Attributes, Raining Gold and Prestigious), which increases the corresponding upgrade of the main game.

## Components

War machines have 3 components:

Components are individual to each war machine and are obtained by opening jewel chests. The drawn compoents are distributed roughly equally across your current machines. When you unlock a new machine, that machine will get nearly all components from jewel chests until it has caught up in total components with your older machines.

## Level

War machines can be upgraded by the Engineer with 20 screws, 12 cogs and 1 metal for 500 expedition tokens. Each upgrade gives 100 xp to the war machine. The xp requirement to level-up the war machine starts at 100 xp for level 2 and increases by 10 xp per level. Each level increases all attributes of the war machine multiplicatively by 5%:

> *level bonus* = 1.05(*war machine level* – 1) - 1
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The total number of levels of all war machines you own determines the level of the Engineer. Each engineer level increases all attributes of all war machines multiplicatively by 5%:

> *engineer bonus* = 1.05(*engineer level* – 1) - 1
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## Blueprints

The attributes of a war machine can also be upgraded with blueprints. Each attribute has a blueprint level. The upgrade cost starts at 100 blueprints for level 1 and increases by 5 blueprints per level. Each blueprint level increases the corresponding attribute multiplicatively by 5%:

> *blueprint bonus* = 1.05*blueprint level* - 1
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The blueprint level is initially capped at 5. The level cap increases by 5 for every 5 war machine levels. The blueprint levels for all attributes together determine the milestone effect. The milestone effect increases multiplicatively by 30% for every 5 total blueprint levels:

> *milestone effect* = 1.3⌊*total blueprint levels* / 5⌋ - 1
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## Crew

Each war machine in your current battle formation can have a crew of heroes. The maximum number of crew members per war machine is determined by the engineer level:

 5 members

Each crew member increases each attribute of the war machine according to the hero's specialization and the hero's jewels:

> *crew bonus* = (1 + *specialization bonus*) \* *jewel bonus*
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The specialization bonus is 40% if the hero's specialization matches the attribute (damage specialization matches damage, healer specialization matches health and tank specialization matches armor) and 0% else. The jewel bonus is the sum of all the hero's jewel effects for the attribute. If the hero doesn't own any jewels for the attribute, the jewel bonus is 40%. The total crew bonus of each attribute is then the sum of the crew bonuses for the attribute:

> *total crew bonus* = *crew 1 bonus* + *crew 2 bonus* + ...
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## Power

The power rating of a single war machine is determined from its attributes in the following way:

> *power* = (10 \* damage)0.7 + (1 \* health)0.7 + (10 \* armor)0.7
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The rating is called battle power, when battle attributes are used, and arena power, when arena attributes are used. The power rating of a squad is the sum of the power ratings of all war machines in the squad.

## List of War Machines

There are currently 13 war machines in the game. Each war machine has its own attributes, specialization and ability and milestone effect.

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