Guardian of the Gateless — ruling 1

Guardian of the Gateless's last ability triggers only once when it's declared as a blocker no matter how many creatures it's blocking.

Guardian of the Gateless : règles, fonctionnement et interactions (MTG)

Guardian of the Gateless 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

Flying This creature can block any number of creatures. Whenever this creature blocks, it gets +1/+1 until end of turn for each creature it's blocking.

How it works : Guardian of the Gateless

Original English text — Wizards of the Coast / Scryfall

#1January 24, 2013· Wizards of the Coast
Guardian of the Gateless's last ability triggers only once when it's declared as a blocker no matter how many creatures it's blocking.
No other card is named in this ruling.