Playing a Rare Candy allows you to immediately place a Stage 2 card onto a Basic Pokemon , though do be aware that you still cannot do this on the turn that your Basic Pokemon card was played
Much more enticing, however, is the ability to get an artifact instead of a creature
Also, with cards like Wishclaw Talisman, the downside of donating the card might be obviated by you using the card to win that turn
Like most Pokmon cards, the value of Light Machamp depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Neo Destiny)
But with reprints of this set well and truly coming to an end, the supply of this Charizard has only gone down, which has forced its price to go up
The "bound" part of daybound and nightbound is serious