Any card that stays on the battlefield after being played: creatures, artifacts, enchantments, planeswalkers, and lands. Instants and sorceries are not permanents — they go to the graveyard after resolving.
Any card that stays on the battlefield after being played: creatures, artifacts, enchantments, planeswalkers, and lands. Instants and sorceries are not permanents — they go to the graveyard after resolving.