Spiteful Prankster — ruling 1

If another creature dies at the same time as Spiteful Prankster, Spiteful Prankster’s last ability triggers for that creature.

Spiteful Prankster — ruling 2

If your life total is brought to 0 or less at the same time that a creature is dealt lethal damage, you lose the game before Spiteful Prankster’s ability goes on the stack.

Spiteful Prankster : règles, fonctionnement et interactions (MTG)

Spiteful Prankster 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

During your turn, this creature has first strike. Whenever another creature dies, this creature deals 1 damage to target player or planeswalker.

How it works : Spiteful Prankster

Original English text — Wizards of the Coast / Scryfall

#1June 23, 2020· Wizards of the Coast
If another creature dies at the same time as Spiteful Prankster, Spiteful Prankster’s last ability triggers for that creature.
No other card is named in this ruling.
#2June 23, 2020· Wizards of the Coast
If your life total is brought to 0 or less at the same time that a creature is dealt lethal damage, you lose the game before Spiteful Prankster’s ability goes on the stack.
No other card is named in this ruling.