Digivolution (進化, Shinka) is a keyword that debut in CB02. It is an official term from a mechanism in the Digimon franchise. Spirits with this effect have the following text:
- Digivolution: Condition - (Start of Your Attack Step) By returning this Spirit to your hand, summon a Condition "Champion" family Spirit card from your hand without paying the cost.
This ability is not limited to any color and made exclusively for Rookie family Spirits. It allows them to call out a stronger Spirit from the Champion family as per stated condition into the field by returning itself to the player's hand.