Only being Instants and Sorceries vs noncreature and not triggering off multiple copies of itself will be parts that make Muse Seeker feel worse
Im Andy, and today Im bringing you the deck led by one of my favorite Rakdos legends, Kardur, DoomscourgeKardur, Doomscourge

Aang, the Last Airbender Abigale, Eloquent First-Year Aclazotz, Deepest Betrayal Adult Gold Dragon Aerial Responder Aetherborn Marauder Aethersphere Harvester Akroma's Will Akroma's Will Akroma, Vision of Ixidor Alela, Artful Provocateur Angel of Indemnity Angel of Invention Angel of Unity Angelic Skirmisher Animus of Predation Archangel Elspeth Archangel of Thune Archangel of Thune Archangel of Wrath Archfiend's Vessel Archon of Sun's Grace Archon's Glory Arctic Aven Arna Kennerd, Skycaptain Assassin Initiate Atraxa's Skitterfang Atraxa, Grand Unifier Atraxa, Grand Unifier Atraxa, Praetors' Voice Aurelia's Vindicator Baneslayer Angel Baneslayer Aspirant (playtest) Barrow Naughty Battlegrace Angel Betor, Ancestor's Voice Bleeding Effect Blessed Defiance Blood Baron of Vizkopa Bonepicker Skirge Boon-Bringer Valkyrie Bre of Clan Stoutarm Breathless Knight Brisela, Voice of Nightmares Butcher of the Horde Cairn Wanderer Captain Marvel, Earth's Protector Celebr-8000 Celestine, the Living Saint Champions of Tyr Chancellor of the Dross Chromanticore Congregation Gryff Cosmic Spider-Man Crystalline Giant Daggerdrome Imp Dawnbringer Charioteers Deep-Cavern Bat Divinity of Pride Donald Blake, Guise of Thor Dragonbroods' Relic Dragonlord Dromoka Dream Trawler Drogskol Reaver Dust Animus Eater of Virtue Eirdu, Carrier of Dawn Elenda and Azor Elenda's Hierophant Elgaud Inquisitor Elspeth Resplendent Enter the Avatar State

Remember also that I generally splash around in a particular section of the Commander pool, so thats how Ill talk about cards relative value
We had a lot of interesting world ideas (most of which you'll be seeing in the next few years), but one plane stood out to me