Some international collectors enjoy the novelty and aesthetic of the Japanese text, even if they cannot read it
Since you have it, keep it in excellent condition
Its challenging to gauge whether your three opponents have a wipe or not but you should always assume that they do and refrain from emptying your hand too quickly unless you have a Teferis Protection, Heroic Intervention, or similar cards or counterspells
By the looks of it, it has collected enough for a nice meal
Theyre always colorless cards in your hand but are treated as their new color if you pay the prototype cost
If youre a new player looking to get into the game, or have a young child expressing interest in getting involved, I think that the build and battle format is one of the best places to start