But for this set Id say theyre almost mandatory, due to the high numbers of dual-faced transforming cards
Blue aggro decks are more interested in playing a tempo-based strategy that can rush down their opponents while disrupting them with efficient countermagic
But within the realm of Mono Red, Solphim, Mayhem Dominus is the perfect general to start us down the path of pyromancy

June 34: Tarkir: Dragonstorm Quick Draft June 1011: MTG Arena Pauper June 1718: Magic: The Gathering FINAL FANTASY Constructed June 2526: Magic: The Gathering FINAL FANTASY Brawl Builder Quick Draft June 3June 18: Aetherdrift June 19June 28: Magic: The Gathering FINAL FANTASY June 29July 7: Outlaws of Thunder Junction July 8July 21: Magic: The Gathering FINAL FANTASY Other Events May 27June 9: Mixed-Up Draft June 6June 8: Historic Metagame Challenge June 10July 14: Jump Into: Magic: The Gathering FINAL FANTASY June 20June 22: Arena Direct: Magic: The Gathering FINAL FANTASY Collector Booster Box June Qualifier Events June 21: Qualifier Play-In Historic Constructed (Best-of-One) June 27: Qualifier Play-In Historic Constructed (Best-of-Three) June 28June 29: Qualifier Weekend Historic Constructed (Best-of-Three) Competitive Play Schedule All times listed are Pacific time (UTC-07:00

Also, if you are flush with bounce spells for the Pact, you can use one to return a troublesome permanent of your opponents with the trigger on the stack so as to make them discard it to the Mind Rot mode
This reprint has an old school art thats a little bland, in my opinion