Removing him sometimes only makes things worse
When the last is removed, sacrifice it.) Vanishing (At the beginning of your upkeep, remove a time counter from this enchantment
Mind, you can do this as many times as you want if you have the means to pay for it
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
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
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