I am not going to argue with data today, so let me say that this is in a lot of decks, a lot of those decks are Chatterfang which is the most popular commander and people didnt read the text on Draugr Necromancer while they did read the text on this card and would rather sac their leyline of the void to not have to pay the mana cost of a card than keep their leyline and pay the mana cost on those cards
Admittedly, Blazing Volley, Pyroclasm, and one half of Burn Down the House all do what Fire Magic does, but better or cheaper
Would you like to see variants of other keyword abilities
As the most common example, only untapped creatures may attack, so the defending player may cast instants or activate abilities that will tap a creature, preventing it from attacking
Unruly Catapult's triggered ability resolves before the spell that caused it to trigger
Smaugmagic mtg token