Nyleas Disciple is a regular inclusion in Green Devotion decks but usually in the sideboard
A promotional card from the Pokmon TCGs third generation, Umbreon , was the most difficult to obtain of all the promotional cards via the Pokmon Players Club
If you lose the flip, destroy the creature your opponent chose
While this isnt the best rate on its own, within an Elf Typal deck, things can quickly get out of hand
(See the aforementioned Ghostway for ideas of other ways to keep people safe.) The only issue I have (other than a mana investment) is that it's harder to build around with things like Darksteel Forge or Bloodghast (tricks you could use with an Oblivion Stone to make things unfair)
Use And They Shall Know No Fear during an attack to protect your creatures while powering them up to kill blockers, or even as a surprise when blocking your opponent