Gunk Slug — ruling 1

Unlike a normal token, a token card doesn’t cease to exist in a zone other than the battlefield. It’s both a token and a card. It can move between zones any number of times and continues to exist for the rest of the game.

Gunk Slug — ruling 2

If a token card is put into a hidden zone, you must use a supplementary token card with a Magic card back to represent it. Since these don’t exist yet, you may need to be creative.

Gunk Slug — ruling 3

For effects that look for or modify the creation of tokens, creating token cards isn’t the same as creating tokens.

Gunk Slug — ruling 4

A Gunk token card is a colorless Gunk sorcery named Gunk with cycling {4}. It has no mana cost, so you can’t normally cast it. It has no spell abilities, so if you do find a way to cast it, it won’t have any effect.

Gunk Slug — ruling 5

Cycling {4} means “{4}, Discard this card: Draw a card.”

Gunk Slug : règles, fonctionnement et interactions (MTG)

Gunk Slug 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 Gunk Slug enters, create three Gunk token cards and shuffle them into target opponent's library. (Gunk is a colorless sorcery card with no mana cost that has cycling .)

How it works : Gunk Slug

Original English text — Wizards of the Coast / Scryfall

#1November 12, 2019· Wizards of the Coast
Unlike a normal token, a token card doesn’t cease to exist in a zone other than the battlefield. It’s both a token and a card. It can move between zones any number of times and continues to exist for the rest of the game.
No other card is named in this ruling.
#2November 12, 2019· Wizards of the Coast
If a token card is put into a hidden zone, you must use a supplementary token card with a Magic card back to represent it. Since these don’t exist yet, you may need to be creative.
No other card is named in this ruling.
#3November 12, 2019· Wizards of the Coast
For effects that look for or modify the creation of tokens, creating token cards isn’t the same as creating tokens.
No other card is named in this ruling.
#4November 12, 2019· Wizards of the Coast
A Gunk token card is a colorless Gunk sorcery named Gunk with cycling . It has no mana cost, so you can’t normally cast it. It has no spell abilities, so if you do find a way to cast it, it won’t have any effect.
No other card is named in this ruling.
#5November 12, 2019· Wizards of the Coast
Cycling means “, Discard this card: Draw a card.”
No other card is named in this ruling.