Roots 
Enchantment — Aura
Enchant creature without flying When this Aura enters, tap enchanted creature. Enchanted creature doesn't untap during its controller's untap step.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL