Ratadrabik of Urborg | Vesuvan Duplimancy | Adrix and Nev, Twincasters

(and one other card)

Cast
Cackling Counterpart by paying ({1} magic symbol) ({U} magic symbol) ({U} magic symbol) , targeting
Adrix and Nev.
Vesuvan Duplimancy triggers, creating two nonlegendary token copies of
Adrix and Nev.
Resolve
Cackling Counterpart, creating eight copies of
Adrix and Nev.
Put all but one legendary
Adrix and Nev into your graveyard due to the legend rule.
When the
Adrix and Nevs die,
Ratadrabik triggers eight times.
Resolve the first
Ratadrabik trigger, creating a number of nonlegendary token copies of
Adrix and Nev equal to 2^(the number of
Adrix and Nevs you currently control) that are 2/2 Zombies in addition to their other types.
Repeat step 6 for each remaining trigger.