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Vanish triggers whenever the card is chosen for an action , not just when attacked

Katara Wishboard Skeleton View on Archidekt Commander (1) 1 Katara, Seeking RevengeKatara, Seeking Revenge In-Deck Lesson Options (10) 1 Aang's JourneyAang's Journey 1 Accumulate WisdomAccumulate Wisdom 1 Azula Always LiesAzula Always Lies 1 Environmental SciencesEnvironmental Sciences 1 Expanded AnatomyExpanded Anatomy 1 Introduction to ProphecyIntroduction to Prophecy 1 Mascot ExhibitionMascot Exhibition 1 Sokka's HaikuSokka's Haiku 1 Teachings of the ArchaicsTeachings of the Archaics 1 Waterbending LessonWaterbending Lesson Wishes (10) 1 Arcane SubtractionArcane Subtraction 1 Cunning WishCunning Wish 1 Death WishDeath Wish 1 Divide by ZeroDivide by Zero 1 Dream StrixDream Strix 1 EyetwitchEyetwitch 1 Fae of Wishes // GrantedFae of Wishes // Granted 1 Hunt for SpecimensHunt for Specimens 1 Poet's QuillPoet's Quill 1 Pop QuizPop Quiz Sideboard (11) 1 Boomerang BasicsBoomerang Basics 1 Confront the PastConfront the Past 1 EnergybendingEnergybending 1 Introduction to AnnihilationIntroduction to Annihilation 1 It'll Quench YaIt'll Quench Ya 1 Mercurial TransformationMercurial Transformation 1 Octopus FormOctopus Form 1 Secret of BloodbendingSecret of Bloodbending 1 Water WhipWater Whip 1 Waterbender's RestorationWaterbender's Restoration 1 Zuko's ExileZuko's Exile Katara, Seeking RevengeKatara, Seeking Revenge is a commander that will see almost no play without a Wishboard option, because, as you can see, the Lesson card pool in Dimir is very small

But, for this article, Im bringing things to Historic Brawl
a Colossus Hammer as "Gaia's Dark Hammer" and a Sword of Truth and Justice as "Tidus's Brotherhood Sword." Check out ICv2's 2025 Magic: The Gathering product calendar for more information on future releases (see "Magic: The Gathering 2025 Release Calendar")
You can earn it by playing cards that allow you to take the initiative, hitting someone who has the initiative or having a player with initiative leave the game while its your turn