The main nuance here is Abundance uses the word may. So Teferi's Ageless Insight replaces one card draw with two, and then Abundance gives you the option of choosing which of those draws you want to replace
The primary win condition of the deck is winning through burn damage
Titan of Littjara Lastly, we have the brand-spanking-new Titan of Littjara
Again, just like 'Orb' and 'Graveborn', since the card text specifies the token as a 'Splinter', this also means that Splinter is somehow still a creature type nowadays
As a cheap one-cost creature, Zack really isnt a terrible choice in decks like this, either
Love the art and flavor text, wish it was a better flicker card tho, u/GolfWhole commented via Reddit