Whenever You Cast A Spell...

An opponent may cast a copy of this spell without paying it's mana cost.
You may pay {x}, where {x} is equal to the number of times you have cast a spell named Whenever You Cast A Spell... this turn plus {c}, if you do, cast a copy of this spell without paying it's mana cost.
"Step One: Befriend a Managorger Hydra. Step Two: Create a rip in spacetime. Step Three: Profit"
-How to Conquer the Tri-State Area for Dummies