Red always has the weakest mythics in Modern Masters (its not the best color in Modern), and that doesnt change in the 2017 Edition
Some of the most powerful examples come in the form of commanders like Geist of Saint Traft, Narset, Enlightened Master, and Uril, the Miststalker
Rather than healing 20 HP, it increases your cards total HP by 20, which in some cases can prevent your Pokmon from getting knocked out in a single hit
Jace, the Mind Sculptor #75 borderless : Priced at around $25 foil and $20 non-foil Liliana of the Dark Realms #78 borderless : Priced at around $22 foil and $19 non-foil Chatterfang, Squirrel General #82 borderless : Priced around $23 foil and $14 non-foil What are the most expensive MTG Bloomburrow main deck cards
I dont know whether Gothic will follow the Beta or the AL approach
On the other hand, for products like Secret Lair drops, Commander decks, or other preconstructed / box-set supplemental products, we used the cost of buying the sealed product (which is generally lower than the cost of buying all of the cards in the product individually) from around the time the set was released (for sealed product, you'll often pay much more if you wait until the set goes out of print to try to buy it)