Add all P* Aria cards and cleanup some messages
Add all Q* Aria cards
Finish Deathbond Witch
Add Emerald Mystic

Implementing Emerald Mystic requires adding a new event type. This
event fires when a mana ability is activated. This allows copying of
mana abilities to behave correctly. Or at least, as correctly as
possible since no offical Magic card allows mana abilities to be copied.