If you do not control 2 or more of the same card types (Ritual, Fusion, Synchro, Xyz, or Link), all Ritual, Fusion, Synchro, Xyz, and Link Monsters you currently control gain 500 ATK
If you run more expensive cards like Embercleave or sideboard tech like Chandra, Torch of Defiance, you might bump it up a few slots
All in all, these cards could probably help some decks as enablers, and would either be forgotten or extremely ridiculously powerful
Not to mention, draw control (Magicians Rod) allows players to spam backline destruction (Dark Magic Attack) and banishment/hand returns (Dark Magic Circle), giving players constant access to a Dark Magician
BT17-097 U Option Return to the Primogenitor Color Blue Green Cost 2 Card Text 1 [Effect] [Main] 1 of your Digimon may digivolve into a level 5 or higher Digimon card with the [Free] trait in your hand with the digivolution cost reduced by 4