When Ossuary Rats enters the battlefield, it deals X damage to target creature or planeswalker an opponent controls, where X is the number of creature cards in your graveyard.
You know you've ventured too deep when the rats stop running and hold their ground.
![Ossuary Rats [Jumpstart 2022]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/files/8edbbe6d-4928-564a-85bb-229cdf06aef0.jpg?v=1771537714&width=1445)