Surge of Undeath provides a small passive regen to all minions

game/modules/tome/data/talents/spells/master-necromancer.lua

@@ -101,7 +101,8 @@ newTalent{
 		All non-ghoul minions are healed by %d%%.
 		If you know Call of the Mausoleum, the time remaining to the next free ghoul is reduced by %d.
 		if you know Corpse Explosion or Putrescent Liquefaction the duration of those effects are increased by %d.
-		All non-undead foes caught inside are dazed for %d turns.]]):
+		All non-undead foes caught inside are dazed for %d turns.
+		In addition all your minions (created after you learn this spell) have a passive health regeneration.]]):
 		tformat(t:_getSpeed(self), t:_getHeal(self), t:_getGhoulDur(self), t:_getGhoulDur(self), t:_getDaze(self))
 	end,
 }

game/modules/tome/data/talents/spells/spells.lua

@@ -209,6 +209,10 @@ function necroSetupSummon(self, def, x, y, level, turns, no_control)
 		game.logSeen(self, "#GREY#%s can not be healed this way!", self:getName():capitalize())
 	end
 
+	if self:knowTalent(self.T_SURGE_OF_UNDEATH) then
+		m.life_regen = 0.5
+	end
+
 	if self:isTalentActive(self.T_NECROTIC_AURA) then
 		local t = self:getTalentFromId(self.T_NECROTIC_AURA)
 		local perc = t:_getInherit(self) / 100