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.
Once Souvenir Snatcher has snatched a noncreature artifact, you’ll continue to control that artifact if it becomes an artifact creature.
17-04-2020
wotc
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.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.