As Kindred Discovery enters the battlefield, choose a creature type.
Whenever a creature you control of the chosen type enters the battlefield or attacks, draw a card.
8/25/2017 If you somehow control a Kindred Discovery with no chosen creature type, its last ability can’t trigger, even if a creature with no creature types enters the battlefield or attacks.
8/25/2017 You must choose an existing creature type, such as Vampire or Cat. Card types such as “artifact” can’t be chosen.
8/25/2017 You can’t choose multiple creature types, such as “Cat Warrior.” A Cat Warrior is both a Cat and a Warrior. It’s affected by anything that affects either type and unaffected by things that affect non-Cat or non-Warrior creatures.