Onyx Goblet

Tap, lose one. That is the entire transaction, repeated each turn for as long as you can spare the activation, and it is exactly the rate that early-era design handed out without much fear. The clock measures one point per turn with no burst and no way to stack the effect, so the goblet competes against every other engine in the deck for the same mana and the same patience. What lifts it a half-step above filler is the targeting: it names one player and lowers that total, rather than hitting each opponent or returning anything to you. That makes the drain a directed clock, useful when there is a single life total to chip away and far less so when there are several to spread across. It sits in the long tradition of black drain effects that lodge the engine in an artifact rather than a creature, so the ability persists through sweepers and spot removal that would erase a body. The cost of that durability is everything else: no pressure on the board, no protection of your own life total, just a slow grind that asks the game to last long enough for one-a-turn to add up. It is an attrition tool from a time when one life per activation read as a fair trade for a card, and the formats it lived in moved on quickly.