Anzrag, the Quake-Mole, and Last Night Together

Prerequisites

• Anzrag, the Quake-Mole on the battlefield
• Last Night Together in hand
• An opponent controls a targetable creature
• available

Steps

1. Activate Anzrag by paying , causing opponents to block Anzrag if able this turn
2. Cast Last Night Together by paying , targeting Anzrag and an opposing creature
3. Declare Anzrag as an attacker, attacking the opponent who controls the creature targeted in step 2
4. The opponent is forced to block Anzrag, triggering Anzrag, untapping all creatures you control and causing you to get an additional combat phase after this one
5. Deal combat damage to the opposing creature, with Anzrag not being destroyed to its indestructible ability, and the creature targeted in step 2 also not being destroyed if it blocked Anzrag
6. Repeat from step 3 each combat phase

Results

• Infinite combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce