What it does
I don't have reliable information about a Magic: The Gathering keyword or ability called "Terror from the Deep." This doesn't correspond to any official MTG keyword, ability word, or game mechanic that I can confirm.
It's possible you're thinking of something else: there are cards with "Terror" in their names (like the classic removal spell Terror), and there are mechanics tied to sea/ocean themes (like Islandwalk or the various Kraken, Leviathan, and Serpent creatures). There's also no ability word matching this phrase in sets I'm aware of.
If you can tell me the specific card name or the set it appears in, I can give you an accurate explanation of how it works and why it matters in Commander. I'd rather not invent rules text that could mislead your gameplay.
Iconic cards with Terror from the Deep
See all 1 →