#15 WotC themselves draw a distinction between 'design' and 'development', where design is making cards and development is adapting those cards to the limited / standard environment
either in the form of checklist cards or protective sleeves
Eye of Ugin clearly breaks the "adds two or more mana" rule (sometimes adding much more than two mana if you have a bunch of colorless Eldrazi in hand)
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Farseek: Farseek can find any land with any of the listed land types, including nonbasic ones, even if that land is a Forest in addition to one or more of those types
Valiant is an ability word that appears on many Mouse creatures and highlights abilities that trigger whenever one of those creatures becomes the target of a spell or ability you control for the first time in a turn
If you had sold a basket of mythics at $470,(and assuming you could have sold all of them quickly enough) you would have netted about 82% of that after fees and shipping, so perhaps $385, which is just about where your cards would be back up to right now, a year later