Opportunist

A pinger with a precondition, and the precondition is the whole design. Most repeatable ping creatures (Prodigal Sorcerer, Rod of Ruin, the long line of "tap: deal 1 to any target" effects) point their damage anywhere they like; this one can only finish what something else started. Its damage is gated to a creature already dealt damage this turn, which makes it less a removal engine than a combat closer: it cleans up an attacker that traded down, or pushes through the last point on something a blocker only chipped. That conditional reshapes the strategic window entirely. The card does nothing without prior damage on the table and nothing to fresh creatures, so it asks for a deck that produces damage on its own (chip blockers, other pingers, an alpha strike that falls one point short) and then converts that damage into a kill. It is a finisher for damage already in motion rather than a source of it, which is a quieter and more demanding job than the free-aim Tim it superficially resembles. Where Prodigal Sorcerer is a self-sufficient repeatable answer, this one is a parasite on combat that has already happened: useless on its own, lethal once the table has bled. The 2/2 body for is incidental; the tap ability is the reason to run it, and the reason it never escaped the niche of decks built to feed it.