Truly, it is nothing particularly memorable as a game
Instead of leaving a creature behind, Briefing digs for the card to be "flashed back." Briefing also doesn't target, so Surgical Extraction isn't a clean answer and Scavenging Ooze is less effective
The Sapphire cards work well with Ruby cards as they feature glimmers and items that give a balance to the aggression, supporting the player with moves like adding cards to their hand or boosting stats
Paying three black to draw 7 and then an additional black to get those 7 cards will cost a lot of life, but it seems like in most scenarios you will get pretty insurmountable card advantage out of that, and 7 life will be worth it
If it was a legendary spell, the Ring tempts you
Meteor Blast Not great, but if you really need a lot of targets, perhaps because youre playing Hinata, Dawn-Crowned, Meteor Blast can do the job