Ban the following one-mana cost creatures in bloomburrow from standard and alchemy
Most of them have too strong abilities to justify having such a low mana cost. A few examples of what the problem is
Pawpatch recruit: punishes people for having to target creatures to stay alive -- kills the control game if there are other creatures in play. Even worse, you can have a second creature with the same ability just for playing two more mana. Offspring in its current implementation was a mistake.
Hearthfire Hero: gets bigger just from targeting it with all those buff spells that are all way to cheap and stays bigger. It wouldn't be so bad if it was a 0/1 and the buff was temporary. But it's a 1/1, and it gets counters instead of a temporary increase in power or attack. Even worse, destroying it often hurts the person destroying it more just because of its second ability that really never should have gone on a creature with its first ability and especially not on a creature that costs only one mana.
Valley Mightcaller: gets permanent +1/+1 counters just for running a type deck. It's only one mana cost yet it gets trample too.
Mistbreath Warrior: even worse than mightcaller as the return condition in the second statement of its ability is not mandatory and you can loop this continually.
Hired Claw: turn 2, attack and do direct damage. Then add a +1/+1 counter. If no blockers, that's 3 damage already in turn 1 from only one creature. Turn 3 is 4 damage just from one creature. Yet Sleep-Cursed Fairy is not allowed to be used until it's finally untapped on turn 3 or 4 for effectively the same damage? This is quite an inconsistency in card design. Sleep Cursed Fairy in comparison practically costs 5 mana to use on turn 3 and only does 3 damage. There seems to be some inconsistency in balancing cards in this set.
You should go back to the one mana cost creature design where at best it was something like a 1/1 with haste or a 2/2 with a drawback for the user. Even no abilities at all. These one mana cost creatures in bloomburrow and arguably mana creatures in general throughout the last few blocks are way too strong for their mana costs.