Usually, they cannot be Special Summoned, and have an effect that returns them to the hand during the End Phase of the turn they are Normal Summoned or flipped face-up (or the turn they are Special Summoned, in case of Spirit monsters that must be Special Summoned)
This makes any token-generating card amazing
The White, Blue, and Black (or Esper) deck for Final Fantasy is built around Y'shtola, Night's Blessed, who incentivises you to cast multiple noncreature spells with mana value 3 or greater in a single turn to drain your opponents and draw cards along the way
Must be Special Summoned by banishing 5 DARK Level 4 monsters from your Graveyard, and cannot be Special Summoned by other ways
Cost & Efficiency: While DIY home printing is possible, it often results in higher costs due to ink consumption and fails to achieve proper opacity
There are a number of powerful graveyard-focused decks in the format, all of which should appreciate its unique combination of abilities
