Descendant of Kiyomaro — ruling 1

If any opponent has more cards or as many cards in hand as Descendant of Kiyomaro’s controller, Descendant of Kiyomaro doesn’t get any bonus.

Descendant of Kiyomaro — ruling 2

Changing the number of cards in any player’s hand can cause Descendant of Kiyomaro to lose the life-gain triggered ability. Once an ability triggers, however, it exists independently of its source.

Descendant of Kiyomaro : règles, fonctionnement et interactions (MTG)

Descendant of Kiyomaro 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 long as you have more cards in hand than each opponent, this creature gets +1/+2 and has "Whenever this creature deals combat damage, you gain 3 life."

How it works : Descendant of Kiyomaro

Original English text — Wizards of the Coast / Scryfall

#1June 1, 2005· Wizards of the Coast
If any opponent has more cards or as many cards in hand as Descendant of Kiyomaro’s controller, Descendant of Kiyomaro doesn’t get any bonus.
No other card is named in this ruling.
#2June 1, 2005· Wizards of the Coast
Changing the number of cards in any player’s hand can cause Descendant of Kiyomaro to lose the life-gain triggered ability. Once an ability triggers, however, it exists independently of its source.
No other card is named in this ruling.