Vigilance
If a permanent entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
Permanents entering don't cause abilities of permanents your opponents control to trigger.
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Elesh Norn, Mother of MachinesBorderless · Step-and-Compleat FoilPhyrexia: All Will Be One · 419 · mythic$413.74
Elesh Norn, Mother of MachinesBorderlessPhyrexia: All Will Be One · 415 · mythic$143.11
Elesh Norn, Mother of MachinesOil Slick Raised FoilPhyrexia: All Will Be One · 345 · mythic$83.66
Elesh Norn, Mother of MachinesConcept Praetor · Step-and-Compleat FoilPhyrexia: All Will Be One · 421 · mythic$82.36
Elesh Norn, Mother of MachinesShowcase · Step-and-Compleat FoilPhyrexia: All Will Be One · 420 · mythic$58.40
Elesh Norn, Mother of MachinesConcept PraetorPhyrexia: All Will Be One · 416 · mythic$48.23
Elesh Norn, Mother of MachinesPromoPhyrexia: All Will Be One · 10 · mythic$37.28
Elesh Norn, Mother of MachinesShowcasePhyrexia: All Will Be One · 298 · mythic$34.52
Elesh Norn, Mother of MachinesPhyrexia: All Will Be One · 10 · mythic$28.26
Elesh Norn, Mother of MachinesPromoPhyrexia: All Will Be One · 10 · mythic$26.74
Ancient Tombuncommon$127.87
Rhystic Study45 · common$72.11
Esper Sentinel012/303 · rare$66.56
Anointed Procession002/269 · rare$66.27
Demonic TutorUMA093/254 · rare$65.72
Gemstone Caverns274/301 · rare$64.87
Urborg, Tomb of Yawgmoth254/254 · rare$60.78
Demonic TutorDVD49 · uncommon$60.05
Minamo, School at Water's Edge279 · rare$58.58
Nykthos, Shrine to Nyx223/249 · rare$56.85
Phyrexian Altar232/254 · rare$54.23
Vampiric Tutor112/249 · mythic$54.15