Pyroceratops — ruling 1

An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.

Pyroceratops : règles, fonctionnement et interactions (MTG)

Pyroceratops 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

Trample Whenever you cast a noncreature spell, put a +1/+1 counter on this creature.

How it works : Pyroceratops

Original English text — Wizards of the Coast / Scryfall

#1April 17, 2020· Wizards of the Coast
An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
No other card is named in this ruling.