Ratadrabik of Urborg, Adrix and Nev, Twincasters, and Duke Ulder Ravengard

Prerequisites

• Ratadrabik of Urborg on the battlefield
• Adrix and Nev, Twincasters on the battlefield
• Duke Ulder Ravengard on the battlefield
• You have at least three opponents

Steps

1. At the beginning of your combat phase, Duke Ulder Ravengard triggers, giving Adrix and Nev haste and myriad until end of turn
2. Declare Adrix and Nev as an attacker
3. Adrix and Nev's myriad ability triggers, creating two token copies of Adrix and Nev that are tapped and attacking each opponent
4. Put all Adrix and Nev tokens into your graveyard due to the legend rule
5. When the Adrix and Nev tokens die, Ratadrabik of Urborg triggers that many times
6. Resolve the first trigger, creating a number of nonlegendary token copies of Adrix and Nev equal to 2^(the number of Adrix and Nevs you control) that are 2/2 Zombies
7. Repeat step 6 for each remaining trigger

Results

• Near-infinite ETB
• Near-infinite creature tokens