You draw a card and discard a card every time shes tapped, and with enough lesson cards in your graveyard, all noncreature spells cost one mana less
They read, Whenever an opponent sacrifices a nontoken permanent or discards a permanent card, you may put that card from a graveyard onto the battlefield under your control. That means you can attack in multiple ways, and as long as youre interfering with your opponents hand and board state, youll benefit massively from it
For more simple card designs, featuring the Harvest Hellos stamp set and a fun chalkboard technique, click HERE
Someone smarter than me figure Emry, Lurker of Koch out
You need to emphasize artifact creatures during deckbuilding, the payoff being something akin to a seven-mana colorless Craterhoof Behemoth