Implement of Combustion

The whole design lives in the second line: when this hits the graveyard from the battlefield, you draw a card. That clause is keyed to leaving play, not to the activation, so any sacrifice outlet cashes the artifact into a card whether or not the damage ability ever matters. The activated ability is almost a courtesy: a red mana and the sacrifice buy a single point to a player or planeswalker, which will only ever be the last point of a clock or a way to chip a low-loyalty planeswalker. Nobody runs this for the burn. They run it because it is a one-mana artifact body that replaces itself the moment it dies, which makes it free fodder for any deck counting permanents or feeding a sacrifice engine. As one of a cycle of one-mana cantrip artifacts, this is the red entry, and the cycle's shared trick is that the cantrip is divorced from the activation: the deck wants the cheap artifact and the replacement card, and treats the colored ability as a marginal upside it may never use. That is the kind of low-opportunity-cost glue artifact strategies have always wanted: a permanent that pads a count, triggers an outlet, and refunds itself, all without asking you to spend a card to keep it around.