Les cinq cartes Twinmaw Stormbrood, Whirlwing Stormbrood, Purging Stormbrood, Runescale Stormbrood et Disruptive Stormbrood, de l'édition Tarkir: Dragonstorm, forment un cycle appelé "Stormbrood" de dragons possédant tous un Omen d'une couleur ennemie.

Source ("There are two cycles of Dragons with Omen spells, one at common where the Dragons are the same color as the Omen spell and one at uncommon on monocolor Dragons with an Omen spell of the Dragon's enemy color. [...] Uncommon [...] A cycle of monocolor Dragons with an enemy-color Omen spell")