I want to make an entity spawn when you break a block, like the silverfish

I am new to mcreator and I have spent more than 9 hours looking for tutorials for version 2022.3 and none of them have worked, all of them are old and none of them are current. Someone could help me? if you could please send me a photo.

I want to make a player break a block and a custom mob I made comes out.

thnk you :3