Lookout's Dispersal — ruling 1

Once you announce that you’re casting Lookout’s Dispersal, no player may take other actions until the spell’s been paid for. Notably, players can’t try to raise the spell’s cost by removing your Pirates.

Lookout's Dispersal : règles, fonctionnement et interactions (MTG)

Lookout's Dispersal 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 spell costs less to cast if you control a Pirate. Counter target spell unless its controller pays .

How it works : Lookout's Dispersal

Original English text — Wizards of the Coast / Scryfall

#1September 29, 2017· Wizards of the Coast
Once you announce that you’re casting Lookout’s Dispersal, no player may take other actions until the spell’s been paid for. Notably, players can’t try to raise the spell’s cost by removing your Pirates.
No other card is named in this ruling.