Its going to be $10, like Jadelight Ranger was) Sell six months before rotation: Carnage Tyrant, History of Benalia Buy when it rotates and is cheapest: Mox Amber (going to get broken at some point, already ticking up in Commander), The Immortal Sun
What truly matters when creating custom MTG cards is finding the right value-to-cost ratio for each one and considering appropriate levels of power for different rarities
Yawgmoth, Thran Physician The creator of those Phyrexians who've been causing such a bother lately, Yawmoth, Thran Physician is a much-desired card in both Modern and Commander, valued at $41
The only difference being that creatures, enchantments, and artifacts stay on the playing field whereas sorceries and instants are placed in your discard pile, also known as your graveyard , after casting their one-time effect
Blue cards are centered around the mental side of battle knowledge, control, manipulation, and foresight