Preface This guide is mostly copy-pasted from a forum entry that has now been removed. It is however cited in the sources to acknowledge the work of the author. Guide For a unit to be a candidate to summon from the void gate, it needs to have a positive health and province, but I don't think it's possible for you to summon with a dead unit or one off the map anyway (that is not dead which can eternal lie?). It needs to have astral magic, but it doesn't matter how much it has. Finally, there is a chance for either a summoning to happen or not. A unit has a "summon chance" property that starts at 0. When it enters the void gate, summon chance is always increased by 20. That is the percent chance that the unit is able to summon from the void gate. If a summoning occurs, the chance is set back to 0. So every unit has a sequential 20%, 40%, 60%, 80%, then 100% chance to summon from the void gate until it summons something, then it is reset back to starting at 20% fo...