Dextremite Efreet

When Dextremite Efreet enters, each player exiles
the top card of their library. Dextremite Efreet deals
amount of damage to each player equal to the mana
cost of the card they exiled this way.

Until their next end of turn, each player may play a
card exiled this way that they do not own, and may
use mana of any color to pay its cost.

Make a wish and burn.