Mishra, Eminent One — ruling 1

Except for name, power, toughness, and types, the token copies exactly what was printed on the original permanent and nothing else (unless that permanent is copying something else or it is a token; see below). It doesn’t copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras attached to it, and so on.

Mishra, Eminent One — ruling 2

If the copied permanent has {X} in its mana cost, X is 0.

Mishra, Eminent One — ruling 3

If the copied permanent is a token, the new token that’s created copies the original characteristics of that token as stated by the effect that created that token (with the listed exceptions).

Mishra, Eminent One — ruling 4

If the copied permanent is copying something else, then the token enters the battlefield as whatever that permanent copied (with the listed exceptions).

Mishra, Eminent One — ruling 5

Any enters-the-battlefield abilities of the copied permanent will trigger when the token enters the battlefield. Any “as [this permanent] enters the battlefield” or “[this permanent] enters the battlefield with” abilities of the target permanent will also work.

Mishra, Eminent One : règles, fonctionnement et interactions (MTG)

Mishra, Eminent One 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

At the beginning of combat on your turn, create a token that's a copy of target noncreature artifact you control, except its name is Mishra's Warform and it's a 4/4 Construct artifact creature in addition to its other types. It gains haste until end of turn. Sacrifice it at the beginning of the next end step.

How it works : Mishra, Eminent One

Original English text — Wizards of the Coast / Scryfall

#1October 14, 2022· Wizards of the Coast
Except for name, power, toughness, and types, the token copies exactly what was printed on the original permanent and nothing else (unless that permanent is copying something else or it is a token; see below). It doesn’t copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras attached to it, and so on.
No other card is named in this ruling.
#2October 14, 2022· Wizards of the Coast
If the copied permanent has in its mana cost, X is 0.
No other card is named in this ruling.
#3October 14, 2022· Wizards of the Coast
If the copied permanent is a token, the new token that’s created copies the original characteristics of that token as stated by the effect that created that token (with the listed exceptions).
No other card is named in this ruling.
#4October 14, 2022· Wizards of the Coast
If the copied permanent is copying something else, then the token enters the battlefield as whatever that permanent copied (with the listed exceptions).
No other card is named in this ruling.
#5October 14, 2022· Wizards of the Coast
Any enters-the-battlefield abilities of the copied permanent will trigger when the token enters the battlefield. Any “as [this permanent] enters the battlefield” or “[this permanent] enters the battlefield with” abilities of the target permanent will also work.
No other card is named in this ruling.