Each archetype you can think of that predates 2010
If the target spell has a variable number of targets, you can't change how many targets it has
As backups, if the $269.99 and $297 prices go out of stock, there are several other sellers boasting prices under the $300 market prices as a backup
The 10 damage is irrelevant, but preventing your opponent from playing Item cards from their hand is almost game breakingly good
Getting Into the Archetype Galvanic Discharge is too good to be confined to UR/RW decks, so seeing that late is more of a red signal than anything else
If a card(s) is destroyed, you can Special Summon it from the Hand, then add a monster from the deck to the hand that is the same as any monster in the Extra Deck, GY, or Banished that was destroyed that turn