In a blog post, Wizards gave the example of Omnath, Locus of Creation, a previously banned card that will be reintroduced with an additional mana cost and an altered ability (it will now let you scry one card instead of drawing a card)
Here's the Pokmon TCG Pocket Triumphant Light expansion full card list
Force of Will gets a box topper treatment featuring new art and some quintessentially blue flavor text
In the event that CGC, at its sole discretion, determines that the fair market value of a collectible is higher than the value stated by the submitter, CGC will move the collectible to the appropriate higher tier and the additional charge will be the responsibility of the submitter
"Enjoy Pokmon TCG Cards Featuring These Spe-Shell Pokmon"
Sacrificing a cheap creature or even a token for the cost is best, but it can put you in a bit of a bind if your only creatures in play are too good to sacrifice or you dont have any creatures in play