Official Q&As: Q222 (06-07-2012): [BT07/001EN：School Hunter, Leo-pald] [BT07/S01EN：School Hunter, Leo-pald] Q. I have 2 different units with the effect, "...at the beginning of your end phase, retire that unit.". The said units are sent to the drop zone at the start of the end phase. In order to call both units back to the field, how many times must I pay the cost? A. 2 times. This limit break ability will activate once for each unit sent to the drop zone, so if you will have to pay the cost once for each unit you would like to call back to the field.