Kindred Boon — ruling 1

If a creature that isn't of the chosen type somehow gets a divinity counter on it, that creature will have indestructible.

Kindred Boon — ruling 2

If a creature has been dealt damage, that damage remains marked on it until the cleanup step. If a creature with a divinity counter on it has been dealt lethal damage, and later in the turn Kindred Boon leaves the battlefield or the counter is removed from that creature, that creature will be destroyed.

Kindred Boon — ruling 3

If you somehow control a Kindred Boon with no chosen creature type, its activated ability can't be activated.

Kindred Boon — ruling 4

You must choose an existing creature type, such as Vampire or Cat. Card types such as "artifact" can't be chosen.

Kindred Boon — ruling 5

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.

Kindred Boon : règles, fonctionnement et interactions (MTG)

Kindred Boon is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

As this enchantment enters, choose a creature type. : Put a divinity counter on target creature you control of the chosen type. Each creature you control with a divinity counter on it has indestructible.

How it works : Kindred Boon

Original English text — Wizards of the Coast / Scryfall

#1August 25, 2017· Wizards of the Coast
If a creature that isn't of the chosen type somehow gets a divinity counter on it, that creature will have indestructible.
No other card is named in this ruling.
#2August 25, 2017· Wizards of the Coast
If a creature has been dealt damage, that damage remains marked on it until the cleanup step. If a creature with a divinity counter on it has been dealt lethal damage, and later in the turn Kindred Boon leaves the battlefield or the counter is removed from that creature, that creature will be destroyed.
No other card is named in this ruling.
#3August 25, 2017· Wizards of the Coast
If you somehow control a Kindred Boon with no chosen creature type, its activated ability can't be activated.
No other card is named in this ruling.
#4August 25, 2017· Wizards of the Coast
You must choose an existing creature type, such as Vampire or Cat. Card types such as "artifact" can't be chosen.
No other card is named in this ruling.
#5August 25, 2017· Wizards of the Coast
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.
No other card is named in this ruling.