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Teval exacts a toll for casting spells, making it so you lose life equal to its mana value, and thats for everything, not just spells you cast with a delve cost
Slimefoot and Squee won't be returned to the battlefield
Accumulate Wisdom is a Instant Lesson that lets you put a card from among the top three of your library into your hand or, if you have at least three Lessons in your graveyard, puts all three of those cards into your hand
Without having to worry about her once-per-combat effect, you can guarantee youre always getting card draw when something dies
then add Galvanic Blast, and change all your mountains to snow-covered and add Skred