You know, I wonder if we'll be getting a Birthing Pod variation in Dragons of Tarkir. A Morphing Pod, if you will.
Morphing Pod - 3G
Artifact
Morph 3G
1G, T, Sacrifice a creature, Turn Morphing Pod face down: Search your library for a creature card with converted mana cost equal to 1 plus the sacrificed creature's converted mana cost, put that card onto the battlefield, then shuffle your library. Activate this ability only any time you could cast a sorcery.
Well, who knows if we'll even be getting non-creature morphs in Dragons, let alone colored artifacts. Regardless, I do think it's pretty likely that we'll be getting Birthing Pod variations in the future.
Other one I thought of:
Dragon Pod - 2R
Enchantment
R, Sacrifice a face-down creature: Search your library for a creature card with converted mana cost equal to 1 plus the sacrificed card's converted mana cost, put that card onto the battlefield, then shuffle your library. It has haste. Sacrifice it at the beginning of the next end step. Activate this ability only any time you could cast a sorcery and only once per turn.