When do abilities that are triggered in the middle of another ability (or chain of abilities) resolve?
The big examples are:
Say I have a Pale Green character and I have 3 Two Thousand Horses and my opponent has a Music Leader in their territory. When do they search their deck?
When do Lost Soul Entry abilities activate? Say I play Two Thousand Horses and Draw "Lawless" Lost Soul, when do the cards get revealed?
Two Thousand Horses: You may interrupt the battle, draw 2 and play the next enhancement.
Music Leader (Abridged): When your opponent uses a draw or search ability (under some conditions) search deck for 2 Enhancements involving music.
Lawless: If you draw this card reveal the top 6 cards of a deck, put Lost Souls in play and the deck's owner may add a revealed evil card to hand.