If your Commander deck is weak or slow because it's following a specific gimmick (such as only including cards where there are hats in the art), then bracket one is likely where your deck is going to be
Its a term that bemuses billions of parents, who understandably think it refers to holographic cards, but instead means pocket monsters colored differently to their usual appearance
Add on the fact that lots of players genuinely dont like the art, and weve got a full-on dud as a bonus card
However, if there are not creatures on the battlefield, then Tamiyo doesnt do a whole lot
Doctor's companion (You can have two commanders if the other is the Doctor.) If Donna is paired with another creature and they are both dealt damage at the same time, the second ability triggers twice
Top 3 Green Common/Uncommons: Defend the Rider: A nice protection trick that can instead give a surprise blocker