The stock list is filled with all these cute little synergies which add depth and complexity to the list -- cast two spells per turn, legendary creatures matter, tokens matter -- but Y'shtola is very clear on what she wants to be doing, and that's chaining together high mv noncreature spells, and this deck simply refuses to do that
Harmless effects like changing a creature's color or tapping/untapping it works just fine
Modern Horizons 3 has a bonus sheet full of these, and two were shown off at MagicCon Chicago: Laelia, the Blade Reforged and Priest of Titania
Black cards classically care about seizing power, and theyre best known for trading life for card draw, destroying or reanimating creatures, and making your opponents discard cards
Each step of printing gives us a new place where something can go wrong, resulting in a ton of really cool variants of ink errors