Like most Magic: The Gathering cards, the value of Demonic Tutor depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Judge Gift Cards 2008)
And the habits that help you to build it are not complicated: Describe the condition accurately, even when it costs you a grade, because an honest LP listing beats a disputed NM one
Goblin King, Goblin Warchief, and Goblin Chieftain are also staples, as haste and cost reduction are both invaluable things to have
This guy is the mayor of one of Innistrads few human strongholds, where they are supposed to be safe from the planes many frightening monsters
But here we go: Starting with one of the least like sets of all time: Mercadian Masks (1999)
Example: Blackcleave Cliffs Buddylands Comes tapped unless you control either one of two land types