It gives your opponent a very tiny amount of information about how much mana worth of cards you could potentially play at instant speed, but in general, mana is only worth what you can convert it into before your mana pool clears
to work, but you'll get two lore for your troubles, and without full removal like Under The Sea or Be Prepared, she can't be chosen to be removed, and you'll be forced to challenge into her
While being a Divination is nice, getting the second ability to boost a creature may be harder
But they did different print runs entirely within 1st edition itself
Sorcery Rare Campbell White null/null NOT LEGAL Standard NOT LEGAL Future LEGAL Historic LEGAL Timeless LEGAL Gladiator LEGAL Pioneer LEGAL Explorer LEGAL Modern LEGAL Legacy NOT LEGAL Pauper LEGAL Vintage LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Standardbrawl LEGAL Brawl NOT LEGAL Alchemy NOT LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool NOT LEGAL Premodern NOT LEGAL Predh Choose one Burn Down the House deals 5 damage to each creature and each planeswalker
If the not-so-subtle flavor text didnt clue you in, Conqueror is essentially Exquisite Blood on a body