'Eye-hand coordination', which is the same as earning an attack action, and 'Iron Wand', which allows you to avoid additional damage and automatic failure, are also noteworthy for raising the high scores of many decks
A very popular card that has seen pplent of play in the deck is Book of Moon
If a face-up Insect Synchro Monster(s) you control is destroyed by battle or card effect, while this card is in your GY: You can banish this card
This orc creature turns each combat step into an opportunity to drain an opponent and make some treasure tokens, which is some great value
They are the ones that will be paired with Courser of Kruphix for not only free searching, but also for changing the top of your library
However, some of them have been meta-defining cards that are crucial to the success of amazing strategies