Interplanar Beacon — ruling 1

Interplanar Beacon’s first ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.

Interplanar Beacon — ruling 2

Both mana produced by Interplanar Beacon’s last ability may be spent on the same planeswalker spell, or each may be spent on different planeswalker spells.

Interplanar Beacon : règles, fonctionnement et interactions (MTG)

Interplanar Beacon 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

Whenever you cast a planeswalker spell, you gain 1 life. : Add . , : Add two mana of different colors. Spend this mana only to cast planeswalker spells.

How it works : Interplanar Beacon

Original English text — Wizards of the Coast / Scryfall

#1May 3, 2019· Wizards of the Coast
Interplanar Beacon’s first ability 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.
#2May 3, 2019· Wizards of the Coast
Both mana produced by Interplanar Beacon’s last ability may be spent on the same planeswalker spell, or each may be spent on different planeswalker spells.
No other card is named in this ruling.