Another effect that has existed and was pretty meh, but when you strap a bunch of card draw on it as well, turns out it's pretty damn strong
"Mill Decks", named after the Millstone card in Magic: The Gathering , the codifier of the offensive use of this effect, are decks that specialize in forcing the the opponent to draw over and over again until they run out of cards to draw, losing the game
In any case, make sure that the final design is not overloaded, that it is simple, and conveys the information clearly
"Number C119: Amethyst Ocean Dragon Lord" Dragon/XYZ/WATER ATK: 2600 DEF: 2000 RANK: 8 (********) Effect: 2 Level 8 Dragon-type monsters You can also Xyz summon this card by using a "Number 119: Amethyst Ocean Dragon" as the Xyz material
Table of Contents show What Are Cost Reducers in MTG