Source (Use of Multicolor - Power Spell Cycle (Rare) - "I believe this cycle turned into the Ascendancy enchantments, such as Jeskai Ascendancy ." - Empires (Rare) - "[...] We went through many iterations, but the one we went with is a cycle of enchantments that cost the wedge's colors. [...] It's possible this is the cycle that became the Ascendancy enchantments.")