Casting with a dead creature

What you were expecting to happen, and what actually happened?
Playing with hobgoblin. He had full mana but low hp. My 2 year old daughter loves to help cast. So on the enemy turn she kept pressing on the hobgoblin (mobile s4). Enemy killed hobgoblin but my daughter could still cast the spell with the dead minion.

What are the steps to make it happen again?
Will try to replicate.

Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!
No screenshot will take one next time.

Aight this is creepy. Or devs leaking information on a Zombie Golbin troop?

Halloween has past so no zombie goblin. Let us know if can make it happen again, or if you can make it happen on a different troop.

Am down for a Zombie Goblin any time of the year.