Makeshift Mauler — ruling 1

You must exile exactly one creature card from your graveyard to cast this spell; you cannot cast it without exiling a creature card, and you cannot exile additional creature cards.

Makeshift Mauler — ruling 2

Players can only respond once this spell has been cast and all its costs have been paid. No one can try to otherwise remove the creature card you exiled in order to prevent you from casting this spell.

Makeshift Mauler : règles, fonctionnement et interactions (MTG)

Makeshift Mauler 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

As an additional cost to cast this spell, exile a creature card from your graveyard.

How it works : Makeshift Mauler

Original English text — Wizards of the Coast / Scryfall

#1April 15, 2013· Wizards of the Coast
You must exile exactly one creature card from your graveyard to cast this spell; you cannot cast it without exiling a creature card, and you cannot exile additional creature cards.
No other card is named in this ruling.
#2April 15, 2013· Wizards of the Coast
Players can only respond once this spell has been cast and all its costs have been paid. No one can try to otherwise remove the creature card you exiled in order to prevent you from casting this spell.
No other card is named in this ruling.