Conquer Club

Spoil troops could be invisible till you attack them. In which case that domains true defender numbers show. (it only takes one attack to reveal all the units at that domain space)

• If you move any troops off of that domain (on is fine) then the invisibility goes away.
  
• Fog of war setting & the enemy owning domain next to the domain in question does not matter.

Ambushes: Tying enemies up by placing ambushing troops:

• If you place all your spoiler troops at one location & don't move any troops off that location(whether they be the original spoils troop or troops you add latter) Then that domain is a ambush spot.
  
• You must choose to place all the troops your getting from cashing in one spoils set, at that location only.
  
• Any time a enemy attacks a ambush they can only attack that domain & nowhere else the rest of the turn.
  
• After a ambush is sprung that domain is no longer ambushed. (unless you set up a new ambush)

Benefit to the game:
I think it would be fun setting surprises for the enemy. Might add some strategy too.