Burglar Rat

Enter-the-battlefield discard stapled to a 1/1 body, and the design lives or dies on a single restriction: the opponent chooses what to pitch. That choice is the whole gap between this and targeted hand disruption like Thoughtseize or Duress, where the attacker picks the card that hurts. Discard where the victim decides is a much softer effect; a player holding a dead land and a haymaker simply throws away the land and keeps the threat. So this is not a card that strips a key piece early. It is a resource-attrition tool, best when the opponent's hand is already low, when the effect can be repeated through blink or recursion, or when any card lost matters because the game is grinding toward empty hands. The body is incidental to the point: a discard effect that happens to leave a chump blocker and a sacrifice target behind, which is precisely why it tends to live in decks that want bodies to feed the graveyard and triggers on the way out. As fair black creatures go, this sits at the modest, repeatable end of the spectrum: an effect that has been printed many times over at common, valued not for the disruption it guarantees but for the friction it adds when the trigger can fire more than once.