Elephant Grass

{G} · Enchantment

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Black creatures can't attack you. Nonblack creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Motor: se resuelve a mano

Rulings (1)

Unless some effect explicitly says otherwise, a creature that can’t attack you can still attack a planeswalker you control.
Wizards of the Coast · 2014-02-01