"I welcome it. The pasture is cleared of weeds and the wolves are frozen solid."
—Lumi, goatherd

「大歓迎ですよ。牧地の雑草は無くなるし、狼も凍り固まっちゃうんですから。」 ――ヤギ飼いのルミ

霜の壁

防衛
霜の壁がクリーチャーを１体ブロックするたび、そのクリーチャーはそれのコントローラーの次のアンタップ・ステップにアンタップしない。

「它来得好。牧野没了杂草，狼也给冻成冰块。」 ～山羊牧人卢美

霜墙

守军
每当霜墙阻挡一个生物时，该生物于其操控者的下一个重置步骤中不能重置。

Wall of Frost

Defender
Whenever Wall of Frost blocks a creature, that creature doesn't untap during its controller's next untap step.

The List

Modern Masters 2017

Planechase Anthology

"I have seen countless petty warmongers gaze on it for a time before turning away."
—Sarlena, paladin of the Northern Verge

Magic 2015

Defender (This creature can't attack.)
Whenever Wall of Frost blocks a creature, that creature doesn't untap during its controller's next untap step.

Magic 2014

If the creature isn’t tapped during its controller’s next untap step (perhaps because it was untapped by a spell), Wall of Frost’s ability has no effect at that time. It won’t try to keep the creature tapped on subsequent turns.

Wall of Frost’s ability tracks the creature, not the creature’s controller. That is, if the creature changes controllers before its first controller’s next untap step, then it won’t untap during its new controller’s next untap step.