Souvenir Snatcher
Creature — Bird
Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Flying
Whenever this creature mutates, gain control of target noncreature artifact.
Flying
Whenever this creature mutates, gain control of target noncreature artifact.
4 / 4
フォーマット
スタンダード : 不可パイオニア : 不可モダン : 不可レガシー : 可能ヴィンテージ : 可能パウパー : 不可統率者戦 : 可能デジタル専用フォーマット
アルケミー : 不可エクスプローラー : 不可ヒストリック : 不可タイムレス : 不可同名カード
統率者（2020年版）#38日本語
カード裁定
2020/04/17
原文Once Souvenir Snatcher has snatched a noncreature artifact, you'll continue to control that artifact if it becomes an artifact creature.
2020/04/17
原文The control-change effect of Souvenir Snatcher lasts indefinitely. It doesn't wear off during the cleanup step, and it doesn't expire if Souvenir Snatcher leaves the battlefield. In a multiplayer game, it does expire if you leave the game. If the artifact's owner leaves the game, that artifact leaves with them.
data from gatherer