Wasp of the Bitter End — ruling 1

You choose a target for Wasp of the Bitter End’s triggered ability right after casting a Bolas planeswalker spell, but you don’t choose whether to sacrifice Wasp of the Bitter End or not until that ability resolves. If the creature becomes an illegal target, the entire ability doesn’t resolve and you can’t sacrifice Wasp of the Bitter End.

Wasp of the Bitter End : règles, fonctionnement et interactions (MTG)

Wasp of the Bitter End 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

Flying Whenever you cast a Bolas planeswalker spell, you may sacrifice this creature. If you do, destroy target creature.

How it works : Wasp of the Bitter End

Original English text — Wizards of the Coast / Scryfall

#1July 14, 2017· Wizards of the Coast
You choose a target for Wasp of the Bitter End’s triggered ability right after casting a Bolas planeswalker spell, but you don’t choose whether to sacrifice Wasp of the Bitter End or not until that ability resolves. If the creature becomes an illegal target, the entire ability doesn’t resolve and you can’t sacrifice Wasp of the Bitter End.
No other card is named in this ruling.