In comparison to the other living weapon Batterskull, casting Kaldra Compleat is not feasible so the card should probably not be played when you expect your Stoneforge Mystic to die
The main method of defeating an opponent is to take down their LP to 0, but there are alternate ways to win, such as the opponent decking out (a player automatically loses if they are required to draw a card but their Deck is empty) or special cards with win conditions
Osai Vultures is interesting because carrion birds aren't what I'd really expect from White to have as minions
Pokemon Trading Card Game Player's Guide
While you can have four of any legendary in your deck, don't forget that if you end up with multiples with the same name in play, you'll have to choose one to put in the graveyard
The Break cards are pretty fantastic as expected, but the available EX and standard cards manage to be just as good at keeping an opponent on their toes