Hazezon Tamar is a rare Legendary Creature — Human Warrior card from Magic Online Promos (PRM), collector number 23956.
When Hazezon enters, create X 1/1 Sand Warrior creature tokens that are red, green, and white at the beginning of your next upkeep, where X is the number of lands you control at that time. When Hazezon leaves the battlefield, exile all Sand Warriors.