Yes you got a weak heal ability. But you recieved an 8|11 for merely 4 + 3 cards + 3 upgrades. Stone Dragon is an 8|10 that costs 10 + 1 card.
Do not forget that "+ 3 cards" is a big cost. Death of complicated decks is waiting for the needed combination. Stone/Basalt Dragon costs 10/12
but requires a single card only.
For 1 more Shard of Divinity you would have paid 4 + 4 cards + 4 upgrades for an 11|14. Basalt Dragon is a 10|12 for 12 + 1 card + 1 upgrade.
This "just 1 more xy card" sometimes means to flip through the half of your deck. Too slow -> expensive.
As for the fractal/mitosis, I did less testing but I experienced that for example an Elite Charger - Fractal deck is much more powerful than a golem deck. And charger is a single card for 5
that provides 7 attack with momentum... But I keep testing.
You can utilize the many shards combination in a shard-only deck (= 6 SoI + many-many random shards,
). Other cards just slow you down and raises the chance of many non-shard cards in your hand. Its obvious that the card must not be OP but such a deck is below average at the best (but again, I keep testing).
At least the following "buffs" would be much required:
- I would somehow allow to select shards to sacrifice when playing a SoI.
- I would somehow allow to combine an already existing Golem with shards in your hand.