well, its card with a pseudo-mitosis already on it, at the expense of essentially having to pay for the card twice over (2
to make the card, 2:aether to play the card). ends up being a continuous stream of 4 atk creatures at a cost of 4
from a single card. it obviously ramps up quickly, if you are able to afford it's costs. lets say you have 5 aether towers and your mark generating quanta to feed these guys for a naive simulation where no other towers/cards are drawn and you dont need/want to use the ability without playing the card immediately after:
turn 1: play 5 towers, gain 5
play one fairie -2
, end turn +6
= 9
banked, 4 damage done this turn
turn 2: produce fairie #2, play fairie 2, -4
, end turn +6 aether =11
banked, 8 damage this turn, 12 overall
turn 3: produce fairie #3 and #4, play fairie 3 and 4, -8
, end turn +6 aether =9
banked, 16 damage this turn, 28 overall
turn 4: produce fairie #5 and #6, play fairie 5 and 6, -8
, end turn +6 aether =7
banked, 24 damage this turn, 52 overall
turn 5: produce fairie #7, play fairie 7, -4
, end turn +6 aether =9
banked, 28 damage this turn, 80 overall
turn 6...
this seems pretty effective for 5 towers and 1 creature over 5 turns, even if youre not able to pay to play the full potential of the cards in the field. its not hard to imagine a tower heavy deck designed to feed the growth of these guys, it may not even need dim shields to hold off the opponent. i suppose you could compare it slightly to ffq, but she is 7
and produces creatures with a duo ability, and those creatures do not have the same creature generating ability (in actuality it brings in a third element)
on a tiny detail, it may be a good idea to not use the word "spirit" in the name of the card unless its part of the spirit/spectre series, not that everyone adheres to this. like i said, tiny detail.