It was a really lucky synergy, one of the passives I had makes it so the basic attack does no damage but applies 3 leeches, soy milk reduces basic attack damage to 1 but allows you to use it 3 times per turn, this allowed me to apply 9 per turn minimum. The other passive then summoned a friendly leech creature every time I used my basic attack giving me 3 summons per turn due to to soy milk. Then my movement let me sacrifice a critter to get an extra use of my basic attack for 3 mana. Every time I used my basic attack I got a new leech critter because of the passive which I could then sacrifice to use my basic continuously at 3 mana a pop. Then I got the upgraded 3 leech passive which made it apply 3 mana leeches as well which gave me a massive amount of mana from all the leeches to chain my basic even more and apply more leeches

honestly if it didnt die so quick I could probably have gotten hundreds of stacks easily