The only problem I can see with that idea is how to phrase the description to make that clear. I don't think it's enough to warrant two quests, but instead it should be one of those 'chaotic factors' that are in some of the other quests like Good Friend.
For the plentiful quests that involve 3 starring villages, wouldn't that be a bad mix with the higher leagues where this idea is supposed to spice life up? With your Crystal league and town hall 9 base, when was the last time you 3-starred a base under any circumstances, let alone with 30% troop capacity or with 50-100 troop space taken up by Goblins?
Oh, and one last thing... here are some of my ideas for quests and such :)
(DAILY)
- Goblin Rival: Earn 40-50 different Single Player Campaign stars (i.e. you can beat each stage to count once per stage per such mission)
- Fried Chicken: Use no spells except Lightning Spells to 3-star (unless you agree with my above argument) an enemy village
- First Aid: Use no spells except Healing Spells to 3-star an enemy village
- Making Me Mad: Use no spells except Rage Spells to 3-star an enemy village
- Get Your Hops Up: Use no spells except Jump Spells to 3-star an enemy village
- A Cool Strategy: Use no spells except Freeze Spells to 3-star an enemy village
(WEEKLY)
- Goblin Foe: Earn 55-65 different Single Player Campaign stars
- Thunderboomers: Use no spells except Lightning Spells to 3-star 8-22 enemy villages
- Battlefield Medicine: Use no spells except Healing Spells to 3-star 8-22 enemy villages
- Burning Passion: Use no spells except Rage Spells to 3-star 8-22 enemy villages
- Leap of Faith: Use no spells except Jump Spells to 3-star 8-22 enemy villages
- Chill Out: Use no spells except Freeze Spells to 3-star 8-22 enemy villages
(MONTHLY)
- Goblin Enemy: Earn 70-80 different Single Player Campaign stars
- Never Strikes Twice: Use no spells except Lightning Spells to 3-star 35-60 enemy villages
- Hospital in a Jar: Use no spells except Healing Spells to 3-star 35-60 enemy villages
- Attitude Problems: Use no spells except Rage Spells to 3-star 35-60 enemy villages
- On the Up and Up: Use no spells except Jump Spells to 3-star 35-60 enemy villages
- Absolute Zero Problems: Use no spells except Freeze Spells to 3-star 35-60 enemy villages
(Yeah, I know this is a liiitle redundant with Lohan23's suggestion, but eh)
(WHEEL OF RICHES REWARDS)
- All Single Player Campaign missions regain 50% loot for you and 5% of loot for everyone in your clan

