It's a fundamental truth of being a #MagicTheGathering player that you end up with a terrible pet card you always wish you could make do good things.

Back in Lorwyn/Alara standard I had a Glaze Fiend eggs deck that was sweet, but not nearly sweet enough to complete with Faeries and Jund.

What's your terrible pet card? (Don't try to lie to me, you have one.)

@Fruan oh wait the other answer is definitely progenitor mimic. It's so slow but I love that if you flicker it after you've made a copy of something and you copy the copy it has the text multiple times so the next upkeep you create more, and then you can recur that multiple times if you do it over turns. I top 8'd a game day somehow with a baby coloured deck using progenitor mimic and wayfaring temple (I'm pretty sure I mostly won not with that synergy)
@EternalRoxas oh my, that is spicy.