Lord Skitter, Sewer King

The elegance here is that the two abilities feed each other without a third piece. The combat-step token generation is a self-sustaining Rat factory: every turn produces a new body, and every new Rat body is another trigger for the exile clause. Most graveyard hate is either a one-shot spell or a static tax that sits on the battlefield doing nothing until it matters; this instead turns incidental token creation into a recurring, opponent-targeted exile that clears whatever a graveyard deck most wants back, one card at a time, on your own schedule. What holds it in check is the "up to one target" language and the fact that each Rat only triggers once as it enters: without a wide swing of new Rats you grind the graveyard down across turns while the board widens beneath you. The token clause deliberately hands out attackers that cannot block, which fixes the card's role as a pressure engine rather than a defensive stall; the Rats it makes are there to swarm, not to hold the line. Reading the two lines together, it is a tribal payoff wearing graveyard hate as a costume: a lord that rewards going wide on Rats specifically, then bolts an interactive punish onto that plan so the go-wide deck also polices the graveyards it would otherwise ignore.