- Flame Crystal is a building with a global effect activated by a special ability; it gives Rage ability to all Infused affinity cards in the game for 30 seconds. Note that it only affect cards with Infused affinity, rather than cards requiring a Fire orb .
- Power: 0
- Activate to enrage those who have an affinity towards fire; every own unit endowed with a Fire affinity in the current game will increasingly more damage the longer it attacks but falls back to its original damage output if it doesn't fight for 10 seconds. Lasts for 30 seconds or until the crystal is destroyed.
- Crowd Control: prevent/ interrupt bonus damage gained from rage.
- Flame Crystal was offered as a Pre-Release Card in special packs called "Essential Fire and Nature Buildings", in mid and late 2010, before the release of Amii edition. Its value at auction was substantially inflated by its pre-release status
|Card Upgrade||Type or Ability||Effect|
|Flame Crystal I||Lifepoints||+40|
|Flame Crystal II||Lifepoints||+80|
|Flame Crystal III||Lifepoints||+80|
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