The difficulty with raw cards lies in the assessment of the condition of the card (i.e., how good of shape it is in) as that can be a fairly subjective assessment
If a card refers to "your commander," it refers to both, although if it's trying to perform an action on your commander, like put it into your hand, you choose which one it's talking about
Ruin Crab mills each opponent without having to directly target them
It can't be used for defense immediately after coming out, but since early-game flying is blue's specialty this time, it probably won't affect things that much
Meanwhile, for China, the last appearance of this rarity is in the Quarter Century Art Collection in March 2025
Alternatively, if you are interested in which PLANETA cards are gaining value, view the trending cards guide