Its also similar to casting an Adventure, as youll get two spells in one should you draw it and want to cast it early
While Eidolon has a creature version of Pyrostatic Pillar, a powerful burn card in its own right, Cemetery Gatekeeper is like a more flexible creature version of Ankh of Mishra
This should help distinguish across the original card types

World Shaper (Black-Red-Green) 0001_MTGEOE_CmdrFace: Hearthhull, the Worldseed 0004_MTGEOE_CmdrFace: Szarel, Genesis Shepherd Hearthhull, the Worldseed Szarel, Genesis Shepherd Eumidian Wastewaker Evendo Brushrazer Planetary Annihilation Baloth Prime Exploration Broodship Horizon Explorer Scouring Swarm Eumidian Hatchery Festering Thicket Vernal Fen Fabled Passage Braids, Arisen Nightmare God-Eternal Bontu Blasphemous Act Hammer of Purphoros Moraug, Fury of Akoum Augur of Autumn Centaur Vinecrasher Formless Genesis Loamcrafter Faun Multani, Yavimaya's Avatar Oracle of Mul Daya Pest Infestation Rampaging Baloths Splendid Reclamation Tireless Tracker Titania, Protector of Argoth World Breaker Escape to the Wilds Gaze of Granite The Gitrog Monster Korvold, Fae-Cursed King Mazirek, Kraul Death Priest Omnath, Locus of Rage Soul of Windgrace Windgrace's Judgment Worldsoul's Rage Canyon Slough Cinder Glade Karplusan Forest Llanowar Wastes Sheltered Thicket Smoldering Marsh Sulfurous Springs Twilight Mire Viridescent Bog Farseek Springbloom Druid Binding the Old Gods Arcane Signet Sol Ring Command Tower Mountain Valley Terramorphic Expanse Infernal Grasp Night's Whisper Sprouting Goblin Aftermath Analyst Beast Within Cultivate Groundskeeper Harrow Nature's Lore Roiling Regrowth Satyr Wayfinder Skyshroud Claim Tear Asunder Juri, Master of the Revue Mayhem Devil Putrefy Rakdos Charm Uurg, Spawn of Turg Bojuka Bog Cabaretti Courtyard Dakmor Salvage Escape Tunnel Evolving Wilds Maestros Theater Myriad Landscape Riveteers Overlook Rocky Tar Pit Wastes 5 Swamp [6bA8M3vfgD4iiRcINhHOVh] 3 Mountain [7bgakB5GyB2U2XUlnWu0JV] 8 Forest [21fHedXjtX2H0UirqBqqn0] Reform the lands of Sothera to carve a path to victory in this Commander deck

Ward forces your opponents to spend even more mana to remove it, making it a good trade for you either way