- Earth Crystal is a Device with a global effect activated by a special ability; it heals all the owner's Gifted Affinity cards in the game for 30 seconds. Note that this ability targets cards with Gifted Affinity rather than cards requiring a Nature orb.
- Earth 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|
|Earth Crystal I||Lifepoints||+40|
|Earth Crystal II||Lifepoints||+80|
|Earth Crystal III||Lifepoints||+80|
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