What this card means is that when you have a subterra (your child's friend) that your opponent (your son) must play his cards up after the battle is won. Also only once every turn may a player play an ability card.No exceptions.Hope this helped 😀
UP TO Ugc setdeka pyro dragonoid stand on yours and knocked it off when I use darkfire blast (I stand a pyrus)( I tested this because I have A diablo) I win this card!