kaldheim set booster box MTG Pack Draft : (KHM) so this is one of several places where players can get a rare or mythic rare in a single Set Booster Sealed Set BOOSTER BOX of

Not only do you make a number of 1/1 goblin tokens equal to its power whenever it attacks, but you get to pump up Krenko first with a +1/+1 counter

Especially the life gain

And since you can tap your commander to untap Leyline Dowser, that can happen whenever your commander doesn't attack for the turn (or do anything else that requires tapping)

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This means that you get your cards whether it dies, is sacrificed (which is also dying, but can sometimes differentiate other triggers), is exiled, or is returned to your hand