Seraphin Solipin, Schemestress

Whenever a player casts a spell, you may pay {1}{u}{r}. If you do, exile it. That player may cast each other spell exiled with Seraphin without paying their mana costs. (If that spell becomes a permanent, they control it.)
"If you're dumb enough to come at the best, of course you'll miss. Nobody that stupid can tell the power from the throne."