It's a solid inclusion in Dinosaur Tribal decks like Gishath, Sun's Avatar, it's an undercosted 7/7 so it's great in Ghalta, Primal Hunger, and it has a whopping 12 mana cost so it's great in CMC Matters decks that run stuff like Nissa's Revelation
(Auction Page) Although Charizard gets most of the attention (and lets face it, he deserves it), his water-type contemporary Blastoise is still one of the most popular and recognizable Pokmon ever, and this is reflected in his value as a collectible
Use evasive creatures to guarantee Treasure triggers
A board wipe in a sword that you can reuse as long as you can re-equip it
I feel this is a direction that modern MTG has shied away from in recent expansions, though I'll save that rant when we get there
If you cast both sides, you're casting them together as a single spell all at once, not as two separate spells at two different times