"Be like the sea: flow around that which is unmovable; for everything else, crash into it unrelentingly."

「海の如く在れ。動かざるものの周りを流れ、容赦なく他の誰にも襲い掛かれ。」

マーフォークの君主

あなたがコントロールしている他のマーフォーク・クリーチャーは＋１/＋１の修整を受ける。
{T}：マーフォーク・クリーチャー１体を対象とする。このターン、それはブロックされない。

Merfolk Sovereign

Other Merfolk creatures you control get +1/+1.
{T}: Target Merfolk creature can't be blocked this turn.

The Lost Caverns of Ixalan Commander

Jumpstart 2022

"We are not an empire, and I am not a queen. But I speak with the shout of the rivers and the whisper of the clinging mist."

Explorers of Ixalan

Duel Decks: Merfolk vs. Goblins

Magic 2011

Other Merfolk creatures you control get +1/+1.
{T}: Target Merfolk creature is unblockable this turn.

To have any effect, Merfolk Sovereign's activated ability must be activated before the declare blockers step begins. Once a Merfolk has become blocked, activating Merfolk Sovereign's ability won't change that.