Boilerbilges Ripper

The five-mana body is the concession, not the point. What this creature really sells is a stapled Fling that fires on entry: sacrifice something you no longer need and redirect two damage anywhere on the board. The sacrifice clause is deliberately generous in what it accepts (another creature or an enchantment) and deliberately restrained in what it produces (two damage, not four, and not enough to close as a one-card burn spell), which places it squarely in the aristocrats lineage where the value lives in the death trigger of what you feed it, not in the removal itself. That is the strategic axis: the two damage is a rider on top of a sacrifice you wanted to make anyway, so the card rewards a board built to profit from its own creatures dying. Note the timing structure. The enters trigger resolves when the creature enters and asks whether to sacrifice; the sacrifice is an optional choice made on resolution, and only if you sacrifice does the reflexive trigger ("When you do") go on the stack to deal the two damage. That two-step shape is the flexibility: with no worthwhile target you simply decline the sacrifice, keep the fodder, and take the 4/4. It folds three jobs (a body, a sacrifice outlet, a small removal spell) into a single card, exactly the kind of density a sacrifice deck wants from a midrange slot.