Stormfury

For each {u} you paid, you may tap target creature. If you paid {u}{u}{u} to cast Stormfury, those creature don't untap during their controller's next untap steps.
For each {r} you paid, you may deal 2 damage to target creature or player. If you paid {r}{r}{r} to cast Stormfury, that damage can't be prevented.