Starting at four toughness means Shantotto is pretty hard to remove early, and lets her serve as a great blocker to boot
In looking over the deck lists, one of the decks in particular jumped out at me as being particularly synergistic and primed for easy upgrades
Creature - Dinosaur Badger Ramp (CTRL to add secondary) Removal Removal (CTRL to add secondary) Tokens Alandra, Sky Dreamer Whenever you draw your second card each turn, create a 2/2 blue Drake creature token with flying
Their beauty, with a spectacular foil finish and extended alternate art, limited availability of just 12 per set, and extreme rarity (about 1 in every 72 booster packs) contribute to their high value
Even as a fair play, its incredibly powerful, becoming a threat that kills off opposing creatures or sends lethal damage to your opponents face