Green creatures and white creatures have protection from Gorgons (A permanent or player with protection can't be targeted, enchanted, equipped, fortified, damaged or blocked by sources of the given property.).
Threshold — Masked Gorgon has protection from green and from white (A permanent or player with protection can't be targeted, enchanted, equipped, fortified, damaged or blocked by sources of the given property.) as long as seven or more cards are in your graveyard.
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