For example, Convolute cast targeting Eternal Scourge wont cause its ability to trigger
These will transform after you fulfill some kind of condition on the card, usually either an activated ability (i.e., paying to exile Terra, Magical Adept) or triggered ability (i.e., having six permanents in the yard for Exdeath, Void Warlock at end of turn)
What made the card so valuable was its perfect Professional Sports Authenticator (PSA) gem mint grading, which means that its condition was as good as brand new
Goro-Goro, Disciple of Ryusei Goro-Goro, Disciple of Ryusei is just so good as a cheap haste enabler and token generator in goblin decks, among others, that it just isnt used that often as a commander
Overall, the weakness system is a convoluted mess because the card game refused to include each of the 18 existing types of Pokmon