It says you can’t summon a creature with “0” but doesn’t say zero what.
The “0” is actually the remaining casting cost of a creature (at least in the first Chapter). If you toggle the creature card off so that it does not cast as it fills up, as it fills the cost of casting the card will reduce down to 0. Then to cast the card toggle it back to active before making your 3 gem match. This will count as a “0” creature being cast.
My version of defenceless says “Win without summoning creatures with Defender”.
I can confirm that it is to play the match without summoning a “Defender” type creature.
Thanks, guys. Explains why I sometimes got it and sometimes didn’t.
I see the “0” too but figured out it was creatures with Defend. I just figured the “0” was a graphical bug that will get fixed.
This. Just a text bug.