You can know use this knowledge to find the probability of drawing a given card in almost any scenario, given that you know how many cards are in your deck, how many copies of the desired card or group of cards are, and how many cards you will be drawing/how many turns you will be taking
You can then channel said mana into X spells like Genesis Wave or win conditions like Helix Pinnacle to overwhelm your opponents
She obviously wants to lead a brand-new archetype in Gruul colors for things that tap and require mana like Feldon of the Third Path or Elder Druid, each of which can drop to one mana each
Heartwood Storyteller will, of course, trigger off of the noncreature spells you cast as well so keep that in mind in case youre running a more spell-heavy group hug deck
Realistically youll assemble this maybe once every several games, since it wants Trazyn, a rock in the yard, and Staff all online at once