If you remember Magical Hats from my previous Weirdest Yu-Gi-Oh cards article from 2 weeks ago, you may recognize the mechanics and general idea as being similar to that card by hiding creatures, moving them around, and attempting to catch your opponent off-guard
Introduced in the Metal Raiders set, this 1st Edition Ultra Rare is one of the best yugioh cards from the early 2000s
(Ideally Spirit Barrier ASAP because he has direct attackers) Have a backup Cloudian in your hand just in case he uses Loading
The reason why it is low on this list is that this deck is in trouble if opponent have good counter to spell castings and has no good counter for non-dragon/machine focused decks
Tri lands make it easier to pay for spells that cost two or three different colors at once
Most decks have a few things that benefit from proliferation and it can be used well against opponents persist creatures, obviously you play Clasp in a non proliferate deck for it being an artifact as well as a cheap creature disruption card however it does often become a great mana sink later in the game