That simultaneously makes Teysa both perfectly efficient on offense and perfectly efficient on defense
This card gives all other instants and sorceries you cast Storm, allowing you to cast a second, free copy with a new target
But if you have a way to get it out of the graveyard, you can continue to use it
In my opinion, it is a strong choice in the current meta, as it has fantastic matchups against 3 out of the top 5 decks and then plays about even with the other two
Joint Exploration takes this idea step further, giving you the choice of an instant speed Preordain for 2 mana (which while inefficient, lets you look at up to 3 new cards), or for the addition of a green mana, staple on Growth Spirals ability to drop another land onto the battlefield a package deal that is well worth the cost of admission