abolisher
n. C1 Advanced abol·ish·er
n. a person who officially ends a law, a system, or a practice.
n. a person who formally puts an end to a law, institution, or practice.
The abolisher of the old tax law was celebrated.
History remembers him as the abolisher of the harsh labor laws that had governed the region for decades.
The role of the abolisher is often fraught with political risk, as dismantling a deeply entrenched system can provoke significant resistance from those who benefit from its continued existence.
From abolish + -er.