On the high end of variance, I wouldnt expect more than eight mythics in a single box

Aerial Extortionist Angelic Gift Angelic Sell-Sword Armed with Proof Case of the Pilfered Proof Cast Out Chosen by Heliod Curse of Silence Dawn of a New Age Detention Chariot Eagle of Deliverance Elspeth Conquers Death Errand-Rider of Gondor Farsight Adept Form of the Approach of the Second Sun Four Knocks Glimmer Lens Inspiring Commander Inspiring Overseer Invasion of Dominaria Loran of the Third Path Mentor of the Meek Nick Fury, Spymaster Novice Inspector Orator of Ojutai Origin of the Avengers Ox Drover Pentarch Ward Potion of Healing Priest of Ancient Lore Primary Research Professor of Symbology Puresteel Paladin Raffine's Informant Resistance Squad Roving Harper Rumor Gatherer Rune of Sustenance Sage's Reverie Sanctuary Warden Search Party Captain Serene Sleuth Settlement Blacksmith Sigarda's Splendor Slayer's Bounty Spark Rupture Sparring Regimen Spirited Companion Splinter, Aging Champion Stack of Paperwork (playtest) Staff of the Storyteller Stalwarts of Osgiliath Tale of Tinviel Teyo, Geometric Tactician The Night of the Doctor The Princess Takes Flight The Restoration of Eiganjo Thraben Inspector Trial of a Time Lord Unquestioned Authority Vault 101: Birthday Party Wall of Omens Wedding Ring Woodland Acolyte

You want to cast a lot of spells each turn, be it cards like Faithless Looting, Tormenting Voice, or rituals, while having prowess creatures in play
Often I find this trade off is well worth the various perks Force Spike brings to the table however it is also a very easily offset downside when you have ways of putting it to alternate use
Genuine cards will not have any visible reactions under UV light
Alternatively, Betor, Ancestor's Voice, turns the deck into more of a recursion-focused one, with a way to reliably bring creatures back from the graveyard