Counterpart

A card is considered to be a counterpart of another card if it is intentionally made similar in appearance or effect.

"Lady of Faith" and "Dryad" are considered counterparts since they were intentionally made similar in appearance. The trend of making counterparts that are similar in appearance is most frequent in early booster sets. "Barrel Dragon" and "Blowback Dragon" are also considered counterparts since the latter's effect was based on the former's. However, counterparts in effect are sometimes less obvious or even unintentional. Other exampes of counterparts include: retrained counterparts, such as "Obnoxious Celtic Guard" to "Celtic Guardian"; enhanced counterparts, such as "Muka Muka" to "Enraged Muka Muka"; Dark counterparts, like Dark Armed Dragon, which have a DARK attribute and resemble older monsters in appearance, name, and effect.