Genju of the Fens
Betrayers of Kamigawa — Uncommon
Enchantment — Aura
: Until end of turn, enchanted Swamp becomes a 2/2 black Spirit creature with ": This creature gets +1/+1 until end of turn." It's still a land.
When enchanted Swamp is put into a graveyard, you may return Genju of the Fens from your graveyard to your hand.