Archelos, Lagoon Mystic 
Legendary Creature — Turtle Shaman
As long as Archelos is tapped, other permanents enter tapped. As long as Archelos is untapped, other permanents enter untapped.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL