Funnily enough, the first set of alternate-art cards on this list don't actually have an artist, since they only feature text
Red has access to plenty of mass artifact destruction spells, like Shatterstorm or Brotherhood's End, but being able to break symmetry on an effect like this is a huge boon in Commander games, since it doesn't punish you for running out your own artifacts early and often.
it leaves your creature unscathed while the opposing creature bears the brunt of your power
Its very rare that we see cards like this printed, so I wouldnt be surprised at all to see Boltwave show up in Burn decks in every format
Whenever you cast a spell, you reveal the card to all players and choose any other card (see below for the cards that you can use) that has that card's mana cost
Things get dicier (and arguably a whole lot more fun!) when several votes are in play