The Last Ronin's Technique (TMT-012) [Teenage Mutant Ninja Turtles]

Sneak 1W (You may cast this spell for 1W if you also return an unblocked attacker you control to hand during the declare blockers step.)

Create three 1/1 white Ninja Turtle Spirit creature tokens. If this spell's sneak cost was paid, they enter tapped and attacking.