Summoner's Bane — ruling 1

You get the token creature, not the controller of the creature spell.

Summoner's Bane — ruling 2

If the targeted spell is an illegal target by the time Summoner’s Bane resolves, the entire spell doesn’t resolve. You won’t get a creature token.

Summoner's Bane : règles, fonctionnement et interactions (MTG)

Summoner's Bane 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

Counter target creature spell. Create a 2/2 blue Illusion creature token.

How it works : Summoner's Bane

Original English text — Wizards of the Coast / Scryfall

#1October 1, 2009· Wizards of the Coast
You get the token creature, not the controller of the creature spell.
No other card is named in this ruling.
#2October 1, 2009· Wizards of the Coast
If the targeted spell is an illegal target by the time Summoner’s Bane resolves, the entire spell doesn’t resolve. You won’t get a creature token.
No other card is named in this ruling.