Draw Engine

Draw Engine refers to a card that repeatedly demonstrated the draw effect while it's in the battle zone

Details
Representative examples include Mist Rias, Sonic Guardian, Aqua Attack (BAGOOON Panzer) as creatures or Hustle Castle as a castle.

Creatures with these abilities are also known as System Creatures. While different from most other draw engines, Factory Shell Q is also considered as one.

Unlike Energy Stream, they don't provide much advantage in the short term. However as their provide an effect for the entire length of their existence in the battle zone, they have to potential to draw more cards in the long term if they left and not removed.

Unfortunately, most of are easy to destroy due to low power, so protection abilities such as Saver might be required.

As psychic or dragheart cards are put into the hyperspatial zone at the start of a game and the zone is considered public information, it is easy to be ready for removal cards such as Aqua Attack (BAGOOON Panzer) or Evidegoras, Dragon Sonic Aircraft Carrier.

Draw Engines are also known as Draw Sources.

Control decks are the most likely to use these form of cards as they aim to gain advantage over a long game in a slow matter while also protecting themselves. As Aqua Attack (BAGOOON Panzer) can be brought out easily, it is even possible to be used in an All Yes discard deck that only uses Light/Darkness cards.

They can be useful to recovering from mass Card Discard such as Lost Soul or Soul Advantage.

While it is most common in the Water Civilization like all cards that draw cards, it exists in all civilizations, but sometimes with different styles. Motrack, Explosive Striker in the Fire Civilization triggers when one of your fire creatures win a battle, and Darkness can draw card(s) when a creature is destroyed (Super Trash Train, Fuuma Devil / Dark Soul Creation).