Adding creatures and instants that are able to blink allows very simple ETB retriggers, and with the commander, you can get a ton of extra retriggers of key abilities, such as drawing cards or creating various Tokens
Dockside Extortionist, for example, can create infinite mana alongside a ton of different creatures
Until now, Legacy of the Duelist followed the Master Rule 4 format, which allowed for only one Fusion, Synchro, XYZ, or Link monster on the field (outside of the effects of Link monsters.) With Master Rule 5, duelists can once again place Extra Deck monsters on any space on the field, allowing for up to six Extra monsters on the field at one time
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It should be done
Were suckers for silly wordplay, though, so thats most of it