Learn and Lesson, like Companion, allows players to accumulate resources from outside of their main deck, although it's not an effect that has never existed within Magic: The Gathering - usually, it's called a "wish" effect
It works particularly well with cards like Lurrus of the Dream-Den and Muldrotha, the Gravetide that effectively reduce the cumulative upkeep cost to
Jace, Arcane Strategist Jace is always about drawing cards and controlling the game
This ability lets you sacrifice artifacts en masse for decks looking to win with cards like Marionette Master or Agent of the Iron Throne
Rather, a second "reflexive" ability triggers when you put two quest counters on Craig Boone this way
Usually you play it for the novelty rather than power