When Forerunner of the Heralds enters the battlefield, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top. Whenever another Merfolk enters the battlefield under your control, put a +1/+1 counter on Forerunner of the Heralds.
![Forerunner of the Heralds [Rivals of Ixalan]](http://paradoxtcg.com/cdn/shop/products/47b10e39-01a3-5f06-930d-60d2052c386c.jpg?v=1702357491&width=1445)
