The final fight is particularly laughable, since your rival is using all four legendary cards and they dont work at all well together
There are lots of cards that give you mana in increments of three, and most lifelink creatures worth playing already have three power or more
Whereas Bosss Orders is a card that cant draw you cards in an otherwise dead hand, Serena can

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While this Unfinity card was an amazing card to use alongside Dockside Exortionist, that card is no longer Commander legal, so players are looking for other homes for this instant