Scooby, Loyal Canine

Partner with Shaggy, Ultra Sleuth (When this creature enters the battlefield, target player may put
Shaggy in their hand from their library, then shuffle.)
As long as you control Shaggy, Ultra Sleuth, whenever Scooby attacks or blocks, create a
Scooby Snack. (It's an artifact with "{2}, {t}, Sacrifice this artifact: You gain 3 life.")
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"Ruh-roh, Raggy!"