Forerunner of the Heralds [Rivals of Ixalan]

Description

Set:	Rivals of Ixalan
Type:	Creature — Merfolk Scout
Rarity:	Uncommon
Cost:	{3}{G}

When Forerunner of the Heralds enters the battlefield, you may search your library for a Merfolk card, reveal it, then shuffle your library and put that card on top of it.
Whenever another Merfolk enters the battlefield under your control, put a +1/+1 counter on Forerunner of the Heralds.