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
This can be used for any number of useful purposes in Commander, but one of the most common is searching for an aura enchantment to attach to Zur himself
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
Standard is, and has long been, vital to thriving local game stores, wrote Vice President of Design Aaron Forsythe