Grim Reaper's Sprint — ruling 1

If the creature Grim Reaper's Sprint would enchant is an illegal target by the time Grim Reaper's Sprint would resolve, the entire spell doesn't resolve. It's put into the graveyard from the stack, so its triggered ability won't trigger, and you won't untap your creatures or get an additional combat phase.

Grim Reaper's Sprint : règles, fonctionnement et interactions (MTG)

Grim Reaper's Sprint 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

Morbid — This spell costs less to cast if a creature died this turn. Enchant creature When this Aura enters, untap each creature you control. If it's your main phase, there is an additional combat phase after this phase. Enchanted creature gets +2/+2 and has haste.

How it works : Grim Reaper's Sprint

Original English text — Wizards of the Coast / Scryfall

#1March 8, 2024· Wizards of the Coast
If the creature Grim Reaper's Sprint would enchant is an illegal target by the time Grim Reaper's Sprint would resolve, the entire spell doesn't resolve. It's put into the graveyard from the stack, so its triggered ability won't trigger, and you won't untap your creatures or get an additional combat phase.
No other card is named in this ruling.