Leonin Elder

One word does all the work, and it is "an" rather than "your." The trigger reads on any artifact entering the battlefield, regardless of who controls it, which turns the body into a counter that ticks up off the opponent's own permanents. A one-mana 1/1 with no impact on the board and no pressure on the clock instead converts artifact density into a rising life total: a Myr entering, an Equipment dropping, an artifact land coming down untapped. The symmetry stops at the condition, though. Only the controller gains the life, so the universal trigger feeds a strictly one-sided payoff. That makes it pure friction against a deck built to flood the board with cheap permanents: every artifact that resolves a piece of its game plan also hands the opposing 1/1 another point, and against a saturated artifact deck those points stack faster than a fragile aggressive draw can close. The card asks for nothing in return: no build-around, no sacrifice outlet, no synergy beyond existing while the other side does the thing it most wanted to do. The cost of being live for a single white mana is that it does nothing in a vacuum and stays inert until the opposing artifact count climbs high enough to fire it several times a turn. It is a tax that bills the most artifact-committed plan the hardest, and bills it without spending a card on interaction.