it all depends on what you value more for the deck
The unique art and low pull rate drive up the value, with recent prices hovering between $200 and $300
Being a Lesson doesn't impact what the card does, but because it has that subtype, it can be cast for just one mana if you control Uncle Iroh, a Creature that makes your Lesson spells cost one mana less
Based on the graph above, the blue ink appears to be made up primarily of Titanium (Ti), Iron (Fe), Copper (Cu) and Zinc (Zn)
Goblin Guide [Extremely Fast and Early Pressure] Most red decks thrive on aggression, and Goblin Guide is one of the strongest red creatures in MTG for that purpose
Also, protect your cards, as their price will directly depend on the card's condition