This gives us what we call "tempo advantage." We'll be two steps ahead of our opponent by casting threats early and often, beating them down to 0, and winning while they still have expensive cards stuck in their hands
At first I was going to discount Mizzium Tank, but given some of the Izzet decks that want to cast lots of noncreature spells on a turn, it might be worth reconsideration
This would already make it a good card, but its the combination of its Shift keyword and ability that really take the cake
As long as it sticks around, your creature spells cost less, which helps you in a big way
See rule 601, "Casting Spells." 711.5
In March 2022, a PSA 10 Charizard sold for $420,000, setting a new record for the most paid-to-date for a shadowless Charizard and making it the third-highest sum ever paid for any Pokmon card