Foul Emissary — ruling 1

Foul Emissary’s last ability triggers if it’s sacrificed for any reason while you’re casting a spell with emerge, whether or not you’re casting that spell for its emerge cost. For example, if you sacrifice it to activate the ability of Ashnod’s Altar while casting Decimator of the Provinces for {10}, its ability will trigger.

Foul Emissary : règles, fonctionnement et interactions (MTG)

Foul Emissary 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 enters, look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order. When you sacrifice this creature while casting a spell with emerge, create a 3/2 colorless Eldrazi Horror creature token.

How it works : Foul Emissary

Original English text — Wizards of the Coast / Scryfall

#1July 13, 2016· Wizards of the Coast
Foul Emissary’s last ability triggers if it’s sacrificed for any reason while you’re casting a spell with emerge, whether or not you’re casting that spell for its emerge cost. For example, if you sacrifice it to activate the ability of Ashnod’s Altar while casting Decimator of the Provinces for , its ability will trigger.
No other card is named in this ruling.