Common 57 The Wardrobe, Belles Confidant Common 70 Beast, Wolfsbane Legendary 99 The Beast Is Mine
Dark Magician has a strong archetype of cards catered to helping him and his fellow wizards whilst facing down his counterpart, the Blue Eyes White Dragon
Another syntax thing I'd have done differently is that I'd have phrased: you can banish 1 LIGHT or DARK monster from your hand or GY
SIRs of mainline mascot Pokemon (Charizard, Pikachu, Eeveelutions) with PSA 10 populations under 1,000 have historically outperformed broader Pokemon market averages over 24-36 month holds
For creature growth strategies, focus on attacking frequently to trigger connive
Alternatively, sets with a high print run or that didnt sell well can be found for the expected value or even less