Olivia, Crimson Bride + Port Razer + Altar of Dementia

Prerequisites

• Olivia does not have summoning sickness.
• An opponent is unable to block your creatures.

Steps

1. 1Declare Olivia as an attacker, attacking an opponent unable to block your creatures.
2. 2Olivia triggers, returning Port Razer from your graveyard to the battlefield tapped and attacking that opponent.
3. 3Deal combat damage with Port Razer, triggering its ability, untapping all creatures you control and getting an additional combat phase after this one.
4. 4Activate Altar of Dementia by sacrificing Port Razer, causing target player to mill cards equal to Port Razer's power.
5. 5Repeat.

Effects

• Infinite combat phases
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite mill
• Infinite self-mill