Othelm lets me pay two mana, tap him and bring back a creature card in the graveyard that was put there from the battlefield this turn
Choosing the right Magic: The Gathering booster pack feels impossible when you're staring at shelves lined with Play Boosters, Collector Boosters, and special editions
If you want to do anything new and innovative, stay away (unless you can get into Magic R&D - see above)
Juri, Master of the Revue and Sek'Kuar, Deathkeeper should love this spell
Gifts Storm, Gifts Reanimator, the Greater Gifts deck that Frank Karsten took to the grand finals of Worlds 2005 and those are just the lists that reference Gifts Ungiven by name
Any card that wants you to shuffle your library specifies so