History suggests that true trophy assets in any collectible category tend to appreciate when three factors align: extreme scarcity, pristine condition, and cultural relevance
That's what's marking this deck as not legal
As a result, Milotic is in ban now
Illustrated by Jorge Jacinto Standard Legal Alchemy Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
You could play games of Commander Archenemy, where you use the typical Commander banlist, or Standard Archenemy, where everyones deck must be Standard-legal (before the addition of the scheme decks, of course)
Big Welcome Labrynth Special Summons a monster from deck or graveyard, while Saffira, Dragon Queen of the Voiceless Voice , Pre-Preparation of Rites and Nadir Servant adds a card from deck or graveyard, and thus they could be negated by Ghost Belle & Haunted Mansion