By using a deck infused with Tama DNA, that Tama will gain experience for every Shard earned during matches against other duellists; for example, a Vixie-infused deck rewards shards for playing non-elemental Tama. Upon a base-level Tama accumulating 100 Shards across multiple battles, there will be an option in the Tama section of the pause menu to evolve it, unlocking a more powerful variant (and this achievement).