I think that it would be great to have some new acheivements, what about "Hero Slayer". Hero slayer would count both Barbarian king and Archer queen, but there could also be seperates one for each hero.
Presuming that they were grouped, it would be like...
Note: Hero kills count as both attacking and defending. So, when your defence gets a hero and also when you kill one while attacking.
Level 1:
"Destroy 50 heroes"
Reward: 20 gems and 50xp
Level 2:
"Destroy 500 heroes"
Reward: 50 gems and 100xp
Level 3:
"Destroy 50000 heroes"
Reward: 100 gems and 1000xp
Thank you for reading,
Yoyo.

