Olivia, Crimson Bride + Port Razer + Viscera Seer

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 Viscera Seer by sacrificing Port Razer, scrying 1.
5. 5Repeat.

Effects

• Infinite combat phases
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite scry 1