6|6 should cost 7 (6 post Damselfly)
7|7 upgraded [6|6 Affinity] should cost 6-7 (5-6 post Damselfly)
However I must warn you that early in the game's history, phase dragon got immateriality as a nerf to Parallel universe.
Sorry, I don't understand OT, why damselfly?
Damselfly recently got a buff that might justify a -1 general cost reduction added to my theory.
I still don't understand what Damselfly has to do with the lesser cost of Lupine compared to Phase recluse.
Old Formula: Flesh Recluse 6 (attack) +0 (0<HP<6) +1 (Web) -1 (Duo) -2 (upgrade) = 4
Adjusted Formula: Flesh Recluse 6 (attack) +0 (0<HP<6) +1 (Web) -1 (Duo) -2 (upgrade) -1 (constant) = 3
Adjusted Formula: Azure Lupine 7 (attack) +1 (5<HP<8 ) -2 (upgrade) -1 (constant) = 5
PS: Flesh Recluse costs 3 in game.
but, I'm comparing to a creature within its own element, phase recluse, not flesh recluse,
btw, what do you mean by constant? constant ability, as in re-usable/constantly available?
(I assume it does, so here is the formula adjusted to Phase Recluse (I hope I have used it correctly ^^; ) :
Formula: Phase Recluse 7 (attack) +0 (0<HP<7) +1 (Web) -1 (Duo) -1 (upgrade) -1 (constant) = 4