This deck played around 20 enchantments to get triggers off his cast ability to make his legendary fun, like Rhystic Study and Sylvan Library, around 15 Frogs and changelings to use his ability on like Yargle, Glutton of Urborg and then some Voltron-ish and unblockable elements
In decks built around enchantments, it scales insanely fast, turning every Aura on the board into extra power
You can grab your Scattered Groves with Arid Mesa or Farseek, use Canyon Slough to fuel your Crypt Ghast while still tapping for red when you need it, and Irrigated Farmland helps turn on your Emeria, the Sky Ruin while still tapping for blue
In theory, this tension could balance out the power level of accepting or not accepting the offer, but the upshot is that if you are the caster of Tempt with Immortality, then you would rather have [card]Rise from the Grave[/card] in almost every situation
What a champ