Sludge Strider
Sludge Strider {1}{W}{U}{B}
Artifact Creature - Insect | Power/Toughness: 3 / 3
Whenever another artifact enters the battlefield under your control or another artifact you control leaves the battlefield, you may pay {1}. If you do, target player loses 1 life and you gain 1 life.
Latest set: [CON] Conflux (U)