The Master, Multiplied + Bloodthirster + Duke Ulder Ravengard

Prerequisites

• An opponent cannot block creatures you control.

Steps

1. 1At the beginning of your combat phase, Duke Ulder triggers, giving a Bloodthirster haste and myriad until end of turn.
2. 2Declare the Bloodthirster targeted in step 1 as an attacker.
3. 3The Bloodthirster's myriad ability triggers, creating a token copy of it tapped and attacking each other opponent.
4. 4Deal combat damage to an opponent using a Bloodthirster token, triggering the token, untapping it and causing you to get an additional combat phase after this one.
5. 5Move to your next combat phase. You will not exile the Bloodthirster tokens due to The Master.
6. 6Repeat.

Effects

• Infinite combat damage
• Infinite combat phases
• Infinite creature ETB
• Infinite creature tokens with haste