You can tap any two untapped artifacts you control to pay the cost of Shao Jun's last ability, including artifact creatures you haven't controlled continuously since the beginning of your most recent turn
If you want to be even techier, try out Night of Souls Betrayal, Urborg Shambler, or Stronghold Taskmaster
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Najeela, the Blade-Blossom creates additional combat phases for each warrior that attacks, making this one of Commander's most explosive tribes
In combination with duplicate cards like Clone, which create a second image of our Commander, the legend rule triggers, then you sacrifice the clone and let your opponents reduce the cards in their hand in addition to discarding them