Tyrik: Mythos of Nethroi is mana intensive and expensive for what the effect does
We have lifelink, deathtouch, mass-pump for flying creatures (who arent easily blocked), and a way to create more flying creatures
you can only exile a spell from your graveyard once
And with rotation coming out at the same time as Edge of Eternities, what better time to look at Standard, and consider how these cards measure up
Notably, if you cast a Lesson spell while you have two Lesson cards in your graveyard, you will still have to discard a card to Chakra Meditation's ability because the Lesson you cast is still on the stack
5 Tome Scour In Pioneer, Tome Scour is the best low mana cost mill card available