Infinite combat phasesInfinite untap of creatures you controlInfinite mana creatures you control can produce
How it works
Activate Anzrag by paying 3, causing opponents to block Anzrag if able this turn.
If needed, cast the card preventing combat damage by paying its mana cost or activate it.
Declare Anzrag as an attacker, attacking an opponent who controls a creature.
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.
Any combat damage that would be dealt is prevented due to the damage prevention effect.