So you want to trade 2 elucidate tc that every wizard who at least finished celestia gets for free. For 4 pigsie tc that people spend days trying to get. Elucidate are rare just not rarer than pigsie.
Elucidate has been retired. No-one is getting elucidate from the Celestia quest or anywhere else any more. The elucidates and simplifies that exist were all from before the cards were retired...trading is now the ONLY way to obtain these and the number in existence is constantly falling as they are used up...forever!