Well, there are two important reasons: your opponent hasn't drawn their card for the turn yet (meaning they have nothing new to fight off your instant with, such as a counterspell), and if your opponent does counter your spell, it'll be on their turn, which means they tap mana
Eisenfels-ex 095/071 SAR Angriff: Repulsor-Axt 60 Schadenspunkte
If you control a "Salamangreat" monster other than "Salamangreat Spinny" and this card is in your GY: You can Special Summon this card, but banish it when it leaves the field
In addition, the two elements the design team wanted, a feeling of transformation and the idea of having parallel mortals and spirits, could still be done with the flip cards
What does Blastoise ex evolve from
This is a smart choice for both players and collectors