Aitsu, Koitsu, Soitsu, and Doitsu translate to "This Guy", "That Guy", "That Other Guy", and "Which Guy?" respectively
Then if a noncreature card was discarded this way, put a +1/+1 counter on each Moogle you control
Being this large for this price at the time was an outstanding deal, even if nowadays it doesn't look like much, and the bonus life points were like adding insult to injury, causing players to wince looking at their hand that little bit more and do it again when you cast additional black spells
Here's a step-by-step guide on how to redeem any gift code using the official website
7 Prank-Kids: Elemental Jokers Your Opponent Won't Be Able To Get Rid Of Prank-Kids are representatives of the four elements, in the most jokey way