Miniature heart problem

[Gatoray]

I have really efficient mobtrap and im sure that grinders killed more than 10 000 mobs (slimes, witches, wither skeletons, creepers) but I dont have any miniature red heart. Am i doing something wrong? Help me please.

Edited May 17, 2014 by Gatoray

[StratusNightstar]

The MFR mob grinder doesn't seem to enable that drop.

[Gatoray]

I built that by video tutorial and that guy get miniature red hearts from it, but thank you for your advice if you have another give it to me please.

[EpicSC]

I built that by video tutorial and that guy get miniature red hearts from it, but thank you for your advice if you have another give it to me please.

 

I have multiple mob grinders that have generated thousands of items and not a single heart. I also have a auto-spawner with an autonomous activator setup that has generated enough hearts to max out me and two other people. So they are definitely not enabled by the grinders.

[StratusNightstar]

I have an idea I'm going to try that has to do with one of the liquid xp blocks that might help with an MFR grinder setup.

[Gatoray]

Okay, let me know then and thank you! 

[StratusNightstar]

Doesn't look like that idea I had will work. Darn it

[Gatoray]

DOuesnt metter. Thank you

[Kalbintion]

Grinders will not create miniature red hearts. The red hearts are considered a "rare" item by the game, so typical mob farms will fail to generate them like it is in current versions of minecraft that nerfed farms like the iron golem one. In order to generate the hearts you will need to make it think a player killed them (ie: an actual player or use of an autonomous activator) is necessary in order for a red heart to have a chance to drop.