When it's no longer necessary to use it to return cards to your hand, you can leave it on the field to use its [Blocker] as a means of defense.
They still show up in: Superfriends decks that want more planeswalker density Themed Commander builds where style points matter Cube , where nostalgia and balance are friends again Casual story deck piles , where Garruk can finally be the jock he always wanted to be If youre buying them for play value alone, thats fine
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If you can use Intimidate, though, you have a great creature
[D] Hangry Tackle 20+ If you have no cards in your hand, this attack does 90 more damage
While you do have to sacrifice an artifact as part of the casting cost, being able to place any artifact in your deck onto the battlefield for its mana value + 2 blue mana is incredibly strong, and can be useful during almost any part of a game