Card name

Circle of Flame

Mana cost

{1}{R}

Mana value

2

Type

Enchantment

Rarity

rare

Set

DCI Promos (DCI)

Collector number

78

Artist

James Paick

Official rulings

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

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.