In most cases, this will result in Magma Pummeler having 0 toughness, so it will be put into its owner's graveyard
This spell simply allows you to choose new targets for a spell or ability, which means you can redirect a lethal spell, a nasty planeswalker ability or even something just mildly inconvenient
The concept here is to Blight other players as much as possible, then target their creatures (or hope they block) so you can build your armies
Google "coffee studies" right now and you'll find five different opinions as to how much you should/shouldn't drink, with credible data to back up every side
While Sabrina's reign in the $120 range is temporarily over, there's no telling when things might turn around for her, as prices are always in flux, particularly as cards get further away from their initial print run