The first time you crew it each time, you can draw two cards if it was double crewed and you smash face, I really like in in Zombie token decks since they have loads of spare 2/2 tokens running around to double crew it
I recommend tribal decks whenever Im teaching the game to new players and still use the Kaldheim Commander deck, Elven Empire, to do so
Its basically Wear // Tear, but you can maindeck it and it hits almost any permanent played in the first few turns of the game
On top of that, when you sacrifice it, you get tempted by the ring, making it an auto addition to decks that care about the mechanic, or just to at least make something harder to block
With the Agate in play, every critters deals one damage to every opponent, then Zinnia creates an offspring and deals one more