These rules added by cards have warped the game since the mid-2000s
In the case of Ritual Summoning, rather than the targeted monster being in your Extra Deck, you will need the Ritual Monster (always printed in a light blue card design) in your hand to be able to summon it
While this art style has faded out over the years, it remains an integral part of the game's history, and many different monster types were designed with this art style in mind
Card Text 2 [Inherited Effect] [All Turns] When this Digimon with [Greymon] or [Omnimon] in its name would be deleted or returned to your hand or deck by an effect, by placing 1 [X Antibody] from this Digimon's digivolution cards at the bottom of its owner's deck, prevent this Digimon from leaving play
Both special sets are from August 1, 1995
This means you could exert a character with Ink cost two, a character with Ink cost three, and a character with Ink Cost five to play the card instead of using your own Ink supply