Mogi Nest E3
building
E base
dim 2: A random Mogi is put into your hand.
0 ATK, 5 HP, 0 MOV, 1 VIS, 0 RNG

This card seems too good but fair. The cost to drop one of these creatures turns up 5, 2 to get the card, 3 to drop but the ability to continously drop creatures is really powerfull at any cost really, you dont have to worry about running out of firepower but the thing is the creatures your getting have powers not just stats, dewdrop mogi is a counterspell, cinder mogi a haste mechanic, wind mogi who potentialy can kill outright creatures on the proper board and who sits aloft at all times, sleet which can be returned to your hand and has aloft. While these guys dont seem so bad, nor does the base the potential to spawn endless creatures is prevelant only in elementals, all other spawn banks have restrictions, a condition to get creatures. Where as this and elemental intersection fire is both unlimited potential. I don't think either needs a full kill, nor do i think there overpowered innately, but they have a potential far greater then the avarage card.
Mogi Nest i think needs to be reduced to 3HP similar to dank pit, and/or raised to 5 flux. A look at dank pit shows a big difference in effect. Or possably have discard a card the cost for getting a mogi instead/besides the flux cost.
I play Mogi Nest in every elemental deck i can, there is little reason not to and that is a clear sign that it needs a tweek.

Hmm...
Hard to say from my experience. I would say that change to 4hp wouldn't really hurt. It is 3 flux building with 5hp, that is a lot and it's base in the same time. What's really the difference between this and Magma Chamber? Salvage (well, useful in certain conditions) and +E domain. For 4 flux of difference, and Magma Chamber cannot give you Mogi cards.

So, yes, I would say that building could be changed a bit, though I don't see that much of problem coming from the fact that for 2 flux you can get a card. Every Mogi costs 3 flux and is not that superb (probably except Cinder but if you have one deployed, all others will be just plain fighters with average stats), for 5 flux they are expensive for what they can do (if you would like to use Sleet Mogi with his ability you would pay 6 flux for him and 3 flux for next ones; this is 1/1 with aloft, I would still choose Thistle Falcon).

So the spamming problem is not that big and will not be big once Elementals will not be able to have 2 flux wells in 3 rounds

But his price for base, ability and 5hp is not really right.

Btw: does anyone playing mono Elementals use Magma Chamber?

the main issue I see is when it's combo'ed with the elemental card that gives you 4!! flux for every card you discard. it's absurdly overpowered and easily won some of the grand tournaments yesterday. with a couple mogi nests out you're essentially getting 2 net flux for every nest per turn which adds up very, very quickly.

I'd agree that nests should be taken down to 4 hp at least. I like more expensive buildings, but it makes flux boosting cards much more powerful