Digimental of Knowledge

Digimon Adventure 02
This Digimental was hidden in a Mayan pyramid. When Daisuke was captured by the Digimon Kaiser, Iori lifted this Digimental releasing Armadimon and used it to armor evolve Armadimon to Digmon.

Cards

 * St-158

Other
Several evolutions are possible using the Digimental of Knowledge.