Arena Rector — ruling 1

If Arena Rector leaves your graveyard before its triggered ability resolves, perhaps because it’s a token and ceased to exist, you can’t exile it and won’t be able to search your library for a planeswalker card.

Arena Rector : règles, fonctionnement et interactions (MTG)

Arena Rector 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

When this creature dies, you may exile it. If you do, search your library for a planeswalker card, put it onto the battlefield, then shuffle.

How it works : Arena Rector

Original English text — Wizards of the Coast / Scryfall

#1June 8, 2018· Wizards of the Coast
If Arena Rector leaves your graveyard before its triggered ability resolves, perhaps because it’s a token and ceased to exist, you can’t exile it and won’t be able to search your library for a planeswalker card.
No other card is named in this ruling.