So I am currently building a Blue & White Prowess + Heroic deck in Standard. The idea that I can boost my heroic creatures with instants and auras and reap the benefit across all my prowess creatures.
I'm interested to know if the below combination will work. The Lotus-Eye Mystics would be in the graveyard, and then I would play Rally the Ancestors. In an ideal scenario the Rally the Ancestors would trigger the Lotus-Eye Mystics Prowess because it's an instant. Then I can return an enchantment aura back to my hand also.
I am assuming that Prowess has to be on the battlefield for the effect to trigger, which means that Rally the Ancestors would return the Lotus-Eye Mystics to the battlefield, but because they were in the graveyard when the instant was cast, the Prowess effect cannot trigger.
Is my assumption correct?