A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
A player, 9 December 2012
Wide Valley Before an action's effect destroys a card in a unit: Negate the destruction. Battle: If there is no Terrain in play at the current battlefield: Put this card into play there.
Harsh taskmaster Battle: Choose your performing Commander and target a Follower in your hand or discard pile: Attach it to him, ignoring costs. Destroy it before this battle resolves. You may take an additional Battle action.
If i use taskmaster while wide valley in play, will the follower destruction be negated? What if i play harsh taskmaster before wide valley in play, will the destruction be negated as well?
Alex Jones (rules official), 11 December 2012
If i use taskmaster while wide valley in play, will the follower destruction be negated? What if i play harsh taskmaster before wide valley in play, will the destruction be negated as well?
The trait on Wide Valley will trigger if it is in play when the destruction effect is applied, ie when the follower is about to be destroyed. It does not matter when the destruction effect was activated, ie whether Wide Valley or Harsh Taskmaster was played first.