Keeper of Kookus 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

: This creature gains protection from red until end of turn.

How it works : Keeper of Kookus

Original English text — Wizards of the Coast / Scryfall

No additional ruling has been published for this card.

Interactions with other cards

These cards' text mentions Keeper of Kookus.

Kookus

Trample At the beginning of your upkeep, if you don't control a creature named Keeper of Kookus, this creature deals 3 damage to you and attacks this turn if able. {R}: This creature gets +1/+0 until end of turn.