They serve to give your side of the board tempo by allowing your creatures to attack (removing defenders), giving you more time to set up the board (removing attackers/expensive creatures), and allow for combat tricks (saving your creatures after damage is on the stack
Warrior of Light helps you jam all of your favorite Legendary heroes from the main set, the Commander product, and the Through the Ages bonus cards respectively ( FIN, FIC and FCA)
Still, the entire point of equipment decks is to win with their assortment of cheap, powerful equipment cards and this card is far from cheap
Although, it is interesting that Webby Vanderquack Enthusiastic Duck is the only one of the bunch without an ability
The alternative arrest mode is a nice option to have, but the tax ability is truly what makes this card notable
Technically, there is an ultra-expensive Secret Lair Showdown variant