It even works in Commander
Foggy Bottom Swamp Foggy Swamp Hunters Foggy Swamp Spirit Keeper Foggy Swamp Vinebender Foggy Swamp Visions Leatherhead, Swamp Stalker Leechridden Swamp Snow-Covered Swamp Sol'kanar the Swamp King Swamp Swamp Mosquito Swampbenders Swampsnare Trap
Im not sure where Anrakyr the Traveller is going, but I appreciate him stopping by
As for Koby, he forces you to trash a card from your hand to activate his KO effect, but he gets to KO a 3-cost or less Character, which makes it easier to remove bigger threats when combined with a cost reduction effect
Honorary Mention: Rahilda, Wanted Cutthroat / Rahilda, Feral Outlaw This mention is only honorable if you use the command zone on Arena, namely, in Brawl with it's Historic card pool