Drider

The body is a fragile 4/3, and that fragility is the whole engine: this creature has to survive combat and connect to pay off, and the reward compounds only as long as it keeps doing so. Each hit spawns a 2/1 Spider with menace and reach, tokens built to keep the damage flowing (menace makes them awkward to double-block around, reach lets them guard the same skies the parent watches). The attrition loop is the familiar kind where connecting once makes connecting again easier, but the risk is all front-loaded onto a body that dies to almost any removal or trade before the loop even starts. The trigger fires on combat damage to a player, not to a creature or any other object: a chump-block shuts the whole thing off, and no token appears when it dies mid-swing. As Drow lore, the drider is a punished elf twisted into spider form, and the card renders that curse as mechanical shorthand: an Elf Spider that breeds smaller spiders every time it lands a blow. It is a slow, grindy value creature whose ceiling lives entirely inside an unanswered attack step, and whose floor is a 4/3 with reach that Wizards is content to let you overpay for.