It's especially good against Brainstorm, as it turns that spell into three damage to any target and a 3/3 on your battlefield
Legendary Artifact - Food Living Lectern , Sacrifice this creature: Draw a card
Sultai strategies are often based around the graveyard since all three colours are strong in graveyard interactions, with abilities dedicated to both putting cards in, and getting them back out
Hybrid animals like the Badgermole Cub are an especially cute version of this treatment
In addition to a more economical use of space, this Groudon is a difficult card to find from Primal Clash, while the jumbo version was a guarantee
If the creature phases back in somehow before the turn is over, it won't get the +3/+3 bonus from the Giant Growth because its effect has a limited duration