Whitemane Lion

Flash
When Whitemane Lion enters, return a creature you control to its owner's hand.

False Dawn

Until end of turn, spells and abilities you control that would add colored mana instead add that much white mana. Until end of turn, you may spend white mana as though it were mana of any color.
Draw a card.

Oketra's Monument

White creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, create a 1/1 white Warrior creature token with vigilance.

Kor Skyfisher

Flying
When Kor Skyfisher enters, return a permanent you control to its owner's hand.