Atraxa, Martyr of Mirrodin

Flying, flash, vigilance, first strike
When Atraxa, Martyr of Mirrodin enters the battlefield choose one-
Martyr - When Atraxa, Martyr of Mirrodin dies double the number of each kind of counter on
any number of target permanents.
Savior- No more than one creature can attack
each combat. No more than one creature can block each combat.