Eclipsed MerrowHow it works & interactions with other cards

Finding Your Way

Eclipsed Merrow features an 'enters' triggered ability that lets you look at the top four cards of your library. From those four, you have the option to reveal a card that satisfies one of three criteria: it must be a Merfolk creature card, a Plains card, or an Island card. Once revealed, that card goes straight to your hand, while the others are tucked away at the bottom of your library in a random order to ensure fresh draws later.

Resolution Step-by-Step

First, the ability triggers and is put onto the stack when Eclipsed Merrow enters the battlefield. As the ability resolves, you look at the top four cards; this is private information until you choose to reveal one. You check the card types and subtypes: if a card has the 'Merfolk' type or the 'Plains' or 'Island' basic land types, it is eligible. Even non-basic lands with those specific subtypes qualify. Finally, you choose one, reveal it to all players, and put it in your hand before putting the remaining cards on the bottom of your library.

Common Mistakes to Avoid

One common error is trying to pick any land card. Remember, the card must explicitly have the 'Plains' or 'Island' subtype or be a 'Merfolk' card; a land that produces blue mana but lacks the 'Island' subtype cannot be chosen. Additionally, unlike some search effects, Eclipsed Merrow does not shuffle your library. The remaining cards must be placed on the bottom in a random order, which is a specific mechanical requirement.

When to Play Eclipsed Merrow

This creature is best played during your main phase to help you find land drops you might have missed or to dig for specific Merfolk synergies. Because its mana cost consists of hybrid white/blue mana, it is exceptionally flexible in mana-heavy decks, serving as both a defensive body and a specialized tutor for your key pieces.

Interaction examples

Doubling the Discovery

Roaming Throne

If you control Roaming Throne with 'Merfolk' chosen as the creature type, Eclipsed Merrow's ability will trigger an additional time. You will look at the top four cards twice, potentially putting two cards into your hand if you find valid targets in both sets of four cards.

Sequential Value

Solemn Simulacrum

Playing Solemn Simulacrum first allows you to search your library for a basic land and shuffle. Afterward, playing Eclipsed Merrow lets you dig through a freshly shuffled deck to find a specific Merfolk or another land, ensuring you maximize your resources across two different types of deck-thinning effects.