Most Fusion Monsters must be Fusion Summoned using two or more Fusion Materials listed on the first line of its text to be properly Special Summoned
The Yugi deck focuses a little on Black Luster Soldier and Gaia the Fierce Knight, something that I really like since Im a sucker for Warrior-type monsters, and BLS is my favorite card
Though exiling four cards a turn sounds like a lot of your deck gone, lets do the math: 100 cards, minus the commander, minus your opening seven-card hand, minus four draw steps by the time you cast this, leaves 88 cards in your library
And since my LGS wont accept tapping our friends to pay for things, were gonna budget for our upgrades
Not being good at drawing cards may be fine in other formats, but in Commander it's an absolute necessity, so this outdated view of the color pie is a major factor in why Mono White struggles in Commander