What it does
"Fire of Tzeentch" isn't a real Magic: The Gathering keyword or ability—it sounds like a thematic name borrowed from Warhammer 40,000 (Tzeentch is a Chaos God in that universe). While Magic has crossed over with Warhammer 40K in the Universes Beyond Commander decks, there's no established MTG mechanic by this name.
If you encountered this on a card, it's likely a custom or homebrew card, a misremembered name, or flavor text rather than a defined keyword. Magic keywords have precise rules definitions in the Comprehensive Rules; "Fire of Tzeentch" doesn't appear there.
If you can share the actual card text or where you saw it, I can explain how it functions. For Warhammer-flavored effects in real MTG cards, the relevant keywords are typically existing mechanics (like deathtouch, ward, or squad) wrapped in 40K flavor.
Iconic cards with Fire of Tzeentch
See all 1 →