Katara, Bending Prodigy (Avatar: The Last Airbender)

Legendary Creature Ñ Human Warrior Ally - At the beginning of your end step, if Katara is tapped, put a +1/+1 counter on her.
Waterbend {6}: Draw a card. (While paying a waterbend cost, you can tap your artifacts and creatures to help. Each one pays for {1}.)