@Krathos: Yes, the creature nomming is a passive. Sorry if I wasn't clear about that. However, notable passives can be listed on the card, such as Pest's quanta drain. And yes, it gets summoning sickness, meaning that it HAS to eat at least one creature.
Huh, true. Can't it have Passive Summoning Sickness? I think if not, it can be UP.
Keep in mind that if you drop a VRap and a RoL turn 1, you just dealt 7 damage for 3 
and can use the Time Towers you presumably used to play the VRap to satiate it and keep dishing out 7 a turn. I wouldn't call that bad, especially for a less damaging element.
Well, Deja Vu's were an option, but summoning sickness makes this a bit slow. However, it may be a too high price for a creature. You'll have to either play one creature every turn, which sometimes will be killed before attacking, or to pay 7/6
by turn 2 (and sacrifice one creature before that), to deal 7 damage per turn... I still prefer Ghost of the Past (and it also has a cool passive).
