During phase 3 or 5 (but not both in the same turn), this player can return to his hand from the discard pile any two non-undead allies.
Copyrights:
TSR
Wizards of the Coast
For a combat based deck, this card could be extremely powerful. Similar to the Ghost Crystal (168/4th), this allows you to get allies back to your hand. However, the Ghost Crystal works only for undead allies, like The Dreaded Ghost (246/4th) and Ancient Dracolich (81/NS), and the Orb of Delight works only for non-undead allies.
Some of the best allies to get with this card include: War Party (54/3rd), Intellect Devourer (213/4th), Assassins (221/4th), Flesh Golem (73/RL), Brine Dragon (45/DL), Chimera (13/DR-chase), and Master Illithid (53/DU).
There is also another great advantage of the orb; it can work in phase 5, after combat (The Ghost Crystal works only in phase 3), so you can return the allies that let you win the attack (or died in a feeble attack).
This works very well in formats with large deck sizes, so allies are easier to fit in. It would also work well in any deck that uses some instant win allies.
I highly recommend this card for any deck that has room an the allies to make it useful.