Katara, Bending Prodigy

Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

At the beginning of your end step, if you have the initiative, draw a card. Draw another card if you've completed a dungeon.

Choose a Background (You can have a Background as a second commander.)

Lifelink

At the beginning of your end step, you may pay . If you do, draw X cards. X can't be greater than the amount of life you gained this turn.

When your commander deals combat damage to a player, if there is no monarch, you become the monarch.

At the beginning of the monarch's end step, that player draws a card.

Whenever you cast a Spirit or Arcane spell, you may put a ki counter on this creature.

At the beginning of the end step, if there are two or more ki counters on this creature, you may flip it.

Raid — At the beginning of your end step, if you attacked this turn, you may draw a card. If you do, discard a card.

When Barrin enters, return up to one other target creature or planeswalker to its owner's hand.

At the beginning of your end step, if a permanent was put into your hand from the battlefield this turn, draw a card.