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[+1]: Untap target land you control. Until your next turn, it becomes a 5/5 Elemental creature with haste. It's still a land.
[−3]: Return target permanent card from your graveyard to your hand.
[−6]: You get an emblem with "Whenever a land enters the battlefield under your control, you may draw a card."
A permanent card is an artifact, creature, enchantment, land, or planeswalker card.
After resolving Nissa's first ability, the target land still has any abilities it had before it became a creature and any other types it had.
You can activate Nissa's first ability targeting a land that's already untapped.
