First, WotC could tweak how the bonus sheet is implemented on MTGA: They have done it in the past, although it really seems extremely unlikely to happen here
Once you have enough Treasures, you can dump all that mana into a Hellkite Charger, and you have yourself an infinite combat loop
There are 20 different lesson cards
After artifacts, they needed to be higher since they are the most commonly played in brews
It is the kind of interaction that allows you to play good magic
Lastly, Abbot of Keral KeepAbbot of Keral Keep feels a bit subpar in a deck that isn't going to really be doing much with its Prowess, but don't let that stop you: If there's anything every Aggro deck needs, it's a means to draw cards attached to a creature with a good body, and that's Abbot of Keral KeepAbbot of Keral Keep in spades