Circle of Flame

Enchantment

Whenever a creature without flying attacks you or a planeswalker you control, this enchantment deals 1 damage to that creature.

"Which do you think is a better deterrent: a moat of water or one of fire?" —Chandra Nalaar

Commander bracket

1 +

Fits any bracket

No Game Changer, land denial, extra turns or two-card combos.

Derived from card traits, not a ruling — bracket rules turn on how a deck intends to use a card. Bracket rules

Salt Score 0.33

How much players resent seeing this card. The scale tops out around 3.1.

Not part of any combo on Commander Spellbook.

Standard Not legal

Pioneer Legal

Modern Legal

Legacy Legal

Vintage Legal

Pauper Not legal

Commander Legal

Oathbreaker Legal

Duel Commander Legal

Brawl Not legal

Standard Brawl Not legal

Historic Not legal

Timeless Not legal

Alchemy Not legal

Penny Legal

Premodern Not legal

PreDH Not legal

Pauper EDH Not legal

Old School Not legal

Future Not legal

Gladiator Not legal

2014-07-18
Circle of Flame's ability triggers only if a creature without flying is declared as an attacker during the declare attackers step. If a creature with flying attacks you or a planeswalker you control and then loses flying, or if a creature without flying is put onto the battlefield attacking you or a planeswalker you control, the ability won't trigger.
2021-02-01
Circle of Flame is banned in Pauper (not just non-legal), due to a special case on MTGO: https://magic.wizards.com/en/articles/archive/news/january-21-2019-banned-and-restricted-announcement