Crystals

Different Crystals in the game reward you with Bots, Resources, or Upgrade Items

Daily Crystal - This crystal earns you 1-3 star bots or Mods. You can collect this crystal from your base extractors every 24 hours.

4-Hour Crystal - This crystal rewards you with either Gold, Ore-13, Basic Spark Essence, or Repair Kits. You can collect this crystal from your base extractors every 4 hours.

1-Star Bot Crystal - summons a guaranteed 1-star bot, randomly generated in the Space Bridge, and is usually rewarded from Missions, or in the Arena.

2-Star Bot Crystal - summons a guaranteed 2-star bot, randomly generated in the Space Bridge, and is usually rewarded from Missions, or in the Arena.

3-Star Bot Crystal - summons a guaranteed 3-star bot, randomly generated in the Space Bridge, and is usually rewarded from Missions, in the Arena, or availed from special offers.

Premium Bot Crystal - summons a guaranteed 2-4 bot. Premium Bot crystal is usually rewarded when earning a milestone in the game (for instance, when joining an alliance), or is usually bought for 100 Energon.

Premium Bot Crystal as shown on the image below

Standard Mod Crystal - gives a 1-3 star Mod, and is usually bought in the Raid Store for 2500 Raid Chips.

Premium Mod Crystal - gives a 2-4 star Mod, and is usually bought in the Raid Store for 75 Energon.

Arena Crystal - This crystal gives small amounts of Gold or Energon, which can be formed from 1000 Arena Chips.

Alliance Crystal – rewards you with higher star-rating Bots or Mods. Alliance Crystal is rewarded when you get to collect a total of 1000 loyalty points (earned from helping out on your alliance).

Tier 1 Mission Crystal - This crystal gives Ore-13 or Energon, which is rewarded when you get to collect a total of 2000 crystal shards when performing Away missions.

Crystals are dragged in the Space Bridge to earn the random rewards inside them