Sparks

Sparks are items that have different functions. There are three types of them:

Color Sparks
Color Sparks are used to upgrade Power Cards. There are 5 kinds of Color Sparks: Red, Blue, Orange, Purple and Green. The amount and type of Color Sparks needed to upgrade a Power Card depends of that card's rarity and level (the more rarity/level, the more Sparks required) and color, respectively.

20 equal Color Sparks and 1000 coins can be used to create a Big Color Spark; this ones are used to upgrade Power Cards too, but they are needed in higher level upgrades mainly. Big Color Sparks can also be bought in the Guild Shop (1 random Big Color Spark costs 75 Foils).

Color Sparks can be obtained in different ways:
 * Clearing levels: Some Robots drop random Color Sparks when they are defeated. Also, stones can contain Sparks inside.
 * Clearing Ancestral Planet. Up to 45 Color Sparks of one color (depending of the selected district) can be obtained in one run. To obtain the maximun amount, all 4 waves must be cleared in one movement.
 * Disenchanting cards. A disenchanted card gives a variable number of Color Sparks according to that card's rarity and level. The given Sparks' color is the same of the cards' one. Additionally, more Sparks are obtained if the disenchanted card is a Void.
 * Accomplishing some misions (either daily or permanent ones).
 * As a reward from Crafts (all Crafts can provide Color Sparks).
 * From Spirit Sparks (see below).
 * Watching in-game ads. A variable amount of Color Sparks is one of the possible rewards.

Supreme Sparks
Supreme Sparks are used to imbue Power Cards (the price for doing it is 5000 coins). There are 7 types of Supreme Sparks (one for every stat). Supreme Sparks grant a permanent boost in the corresponding stat: They can be obtained:
 * As a Speed Reward.
 * Accomplishing some misions (either daily or permanent ones).
 * As a reward from Crafts (all Crafts can provide Color Sparks).
 * As an Invasion Alpha reward (2 of them are always given).
 * In the Guild Shop. 1 Supreme Spark of the desired type costs 25 Foils.

Spirit Sparks
Spirit Sparks have many different uses: The main obtention method is getting them from friends (1 Spirit Spark daily can be sent to everyone on the friend list). Additionally, 15 Spirit Sparks are always obtained as a reward in Beta Invasion.
 * Material required to level up Aliens.
 * Currency to buy Power Cards in Shop.
 * Material used to obtain Color Sparks. Paying 1000 Coins, 10 Spirit Sparks can be interchanged for some Color Sparks.