New hero and defensive building idea

The new hero, the witch queen. Same A.I ad the troop but she has more health, and her projectile attack does more damage. Every time she summons skeletons, she regenerates 25 percent of the lost health. So if she has 1000 health and she is taken down to 900 she will regenerate 25 health. She is a available at town hall 9, and the number of skeletons generated depends on the level. Level 1-5 is 5 skeletons. 6-10 is 6, 11-15 is 7, so on. And now for the defensive building ( can't think of name ) but anyways it is a building that takes up a 3X3 spacing that allows the player to put his or her troops in it for defence only. Level 1 holds 10 troops level 2 holds 15, pretty much a clan castle for defence and you are the only one to donate in it. The only catch is, is that if you fill up the building, your normal clan castle can only be used for offense. That way you can have a full defensive clan castle and you don't have to worry about requesting all the time. Please tell me what you think of my ideas in the comments below.