Geometric Weird — ruling 1

Geometric Weird’s effect sets its power and toughness indefinitely until something sets them to a different number.

Geometric Weird — ruling 2

To determine its potential new power and toughness, count the number of spells and abilities that were on the stack at the same time, but don’t count abilities if you’ve already counted another ability from the same source.

Geometric Weird — ruling 3

Among abilities, only activated and triggered abilities use the stack. Activated abilities are written in the form “[Cost]: [Effect].” Triggered abilities use the word “when,” “whenever,” or “at.” They’re often written as “[Trigger condition], [effect].” Some keyword abilities are activated abilities and will have colons in their reminder texts, and some keyword abilities are triggered abilities and will have “when,” “whenever,” or “at” in their reminder text.

Geometric Weird : règles, fonctionnement et interactions (MTG)

Geometric Weird 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

At the beginning of each end step, you may have Geometric Weird's base power and toughness each become equal to the greatest number of spells and abilities from different sources that were on the stack simultaneously that turn.

How it works : Geometric Weird

Original English text — Wizards of the Coast / Scryfall

#1November 12, 2019· Wizards of the Coast
Geometric Weird’s effect sets its power and toughness indefinitely until something sets them to a different number.
No other card is named in this ruling.
#2November 12, 2019· Wizards of the Coast
To determine its potential new power and toughness, count the number of spells and abilities that were on the stack at the same time, but don’t count abilities if you’ve already counted another ability from the same source.
No other card is named in this ruling.
#3November 12, 2019· Wizards of the Coast
Among abilities, only activated and triggered abilities use the stack. Activated abilities are written in the form “[Cost]: [Effect].” Triggered abilities use the word “when,” “whenever,” or “at.” They’re often written as “[Trigger condition], [effect].” Some keyword abilities are activated abilities and will have colons in their reminder texts, and some keyword abilities are triggered abilities and will have “when,” “whenever,” or “at” in their reminder text.
No other card is named in this ruling.