Except for creatures named Akron Legionnaire and artifact creatures, creatures you control can't attack.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)

Whenever Donna or a creature it's paired with is dealt damage, Donna deals that much damage to target opponent.

Doctor's companion (You can have two commanders if the other is the Doctor.)

When Haru-Onna enters, draw a card.

Whenever you cast a Spirit or Arcane spell, you may return Haru-Onna to its owner's hand.

When Kiri-Onna enters, return target creature to its owner's hand.

Whenever you cast a Spirit or Arcane spell, you may return Kiri-Onna to its owner's hand.

When Lagonna-Band Storyteller enters, you may put target enchantment card from your graveyard on top of your library. If you do, you gain life equal to its mana value.

When Nikko-Onna enters, destroy target enchantment.

Whenever you cast a Spirit or Arcane spell, you may return Nikko-Onna to its owner's hand.

: Remove target attacking creature you control from combat and untap it. (If you activate during end of combat, the creature will untap after it deals combat damage.)

Flying, haste

Haste

Whenever you cast a spell that targets Tenth District Legionnaire, put a +1/+1 counter on Tenth District Legionnaire, then scry 1.