Satoko, Trap Virtuoso

Ascend (If you control ten or more permanents,
you get the city's blessing for the rest of the
game.)
Satoko can't attack or block unless you have the
city's blessing.
{u}, {t}: Create a colorless artifact token named
Trap with "{t}, Sacrifice this artifact: This
artifact deals 2 damage to target attacking
creature. Prevent all combat damage that
creature would deal this turn."