Ah, yes, Luciferin works too. In that case, -1 cost and the DR is arguably situational.
If, like mentioned, it is used on FFQ deck, then 1+2+3 = 6
= out in 3 turns (instead of 4). But in Luci decks, Fractal decks, the cost does not make that big of a difference.
It's also interesting to see that both -1 cost and +1 DR buff (compared to unupped) are tied.