Perception Bobblehead — ruling 1

The value of X is determined only once, as Perception Bobblehead’s last ability resolves.

Perception Bobblehead — ruling 2

You choose whether to cast a spell from among the cards you’re looking at as Perception Bobblehead’s last ability resolves. You can’t wait to cast one later in the turn. Timing restrictions based on the card’s types are ignored.

Perception Bobblehead — ruling 3

If you cast a spell “without paying its mana cost,” you can’t choose to cast it for any alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, those must be paid to cast the spell.

Perception Bobblehead — ruling 4

If a spell you cast has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.

Perception Bobblehead : règles, fonctionnement et interactions (MTG)

Perception Bobblehead 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

: Add one mana of any color. , : Look at the top X cards of your library, where X is the number of Bobbleheads you control. You may cast a spell with mana value 3 or less from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.

How it works : Perception Bobblehead

Original English text — Wizards of the Coast / Scryfall

#1March 8, 2024· Wizards of the Coast
The value of X is determined only once, as Perception Bobblehead’s last ability resolves.
No other card is named in this ruling.
#2March 8, 2024· Wizards of the Coast
You choose whether to cast a spell from among the cards you’re looking at as Perception Bobblehead’s last ability resolves. You can’t wait to cast one later in the turn. Timing restrictions based on the card’s types are ignored.
No other card is named in this ruling.
#3March 8, 2024· Wizards of the Coast
If you cast a spell “without paying its mana cost,” you can’t choose to cast it for any alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, those must be paid to cast the spell.
No other card is named in this ruling.
#4March 8, 2024· Wizards of the Coast
If a spell you cast has in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
No other card is named in this ruling.