It started as a graded card marketplace, but it sells ungraded cards and sealed product now too, so it's become a lot more versatile than it used to be
Cards that generate additional mana, like Mana Reflection, Mirari's Wake, and Nyxbloom Ancient, can help accelerate your mana production and enable you to cast this powerful monster and other devastating ones like Avenger of Zendikar
In Innistrad: Crimson Vow, Disturb works the exact same way, but with a slight difference in that the reverse side of the card is an Enchantment Aura instead of a Spirit creature
Unless something catastrophic happens I can't imagine how it could take longer than the end of July, certainly
Energy - Special Energy If this card is attached to 1 of your Pokmon, discard it at the end of your turn
Kiora could show up at the top tables and jump to $40 at any point, but a slow decline toward $15 and then $10 is far more likely