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.
Underneath the cities of Esper are cycles of life unseen by those who feed them.
![Sludge Strider [Planechase]](http://tothetablebgc.myshopify.com/cdn/shop/files/8d6025a1-2da0-48d0-b7c4-65c85ba51ceb.png?v=1776365500&width=1445)
