Mirri, Weatherlight Duelist

First strike
Whenever Mirri attacks, each opponent can't block with more than one creature this combat.
As long as Mirri is tapped, no more than one creature can attack you each combat.

Mystery Booster 2

First strike
Whenever Mirri, Weatherlight Duelist attacks, each opponent can't block with more than one creature this combat.
As long as Mirri, Weatherlight Duelist is tapped, no more than one creature can attack you each combat.

Special Guests

Commander Masters

Secret Lair Drop

Tapping Mirri after creatures have attacked will not remove creatures from combat.

While Mirri is tapped, there's no restriction on how many creatures can attack planeswalkers you control or battles you protect.