Soul Echo Soul Echo is an odd Mirage card
This means that in most cases, Demon-tribal decks tend to have a rather high mana curve
Despite that effect for just 1 mana wouldnt be too strong already, the card cantrips as well by replacing itself making the player not even lose a resource of it With a resolved Veil of Summer you successfully crushed your opponent by letting him play a card, countering the effect and drawing a card of it just for a single green mana which overall feels just wrong from any perspective youre looking at it

3 Chaos, the Endless Clive, Ifrit's Dominant Cloud, Planet's Champion Esper Terra Firion, Wild Rose Warrior Freya Crescent Garland, Knight of Cornelia Gilgamesh, Master-at-Arms Giott, King of the Dwarves Gladiolus Amicitia Ifrit, Warden of Inferno Joshua, Phoenix's Dominant Kefka, Court Mage Kefka, Ruler of Ruin Kuja, Genome Sorcerer Lightning, Army of One Lightning, Security Sergeant Phoenix, Warden of Fire Prompto Argentum Queen Brahne Raubahn, Bull of Ala Mhigo Rydia, Summoner of Mist Seifer Almasy Shantotto, Tactician Magician Tellah, Great Sage Terra, Magical Adept The Emperor of Palamecia The Fire Crystal The Lord Master of Hell Trance Kuja, Fate Defied Vaan, Street Thief Vivi Ornitier World Champion, Celestial Weapon Zell Dincht Zidane, Tantalus Thief
Teenage Mutant Ninja Turtles Teenage Mutant Ninja Turtles play booster boxes might have a few cards that look like they came from a New York sewer, but when that turns into a reduced cost for the box overall, I'm good with that
Suddenly using auras and equipment isn't such a risky gambit, since it's almost guaranteed your creatures will be sticking around for some time