Instead, Saga creature cards balance that big impact with temporary presence, dependably swinging the pendulum of pressure back to your opponent after all, you paid mana for something that goes away eventually but presents an interesting dilemma: Does your opponent block it
If an effect has given Infesting Radroach -4/-0 so that it's a -2/2 creature, doubling its power gives it -2/-0, and it becomes a -4/2 creature
They can still be used in the deck like a normal card
The ninjutsu mechanic is also perfect since you need a creature to go unblocked to activate it
It is incredibly difficult to get to a win through this card once it resolves
And in this particular instance, to sweeten the pot ever more, Spring to Mind is even better than just drawing a second spell to use laterit's drawing you two cards from your deck later on