Seeing as Moonshae is based on Celtic mythology, the troublesome pixie fits in well here
This is good fixing, although I think the duals are usually a little better
That said, since you have to discard the card at your next upkeep, it means that if you play it turn 2 you will need a madness card for 2 or less mana to be able to play it
Its also worth mentioning that this doesnt just happen during your turn, but each turn, so if you have anything that allows you to cast spells from exile on your opponents turns this would trigger then as well
Ethical, not ethical, do you care at all
Loot, Exuberant Explorer This is another card that I think has potential in both the command zone and the 99