From Compendium of Worldly Lore
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Source: Encyclopedia Arcane: Conjuration
Description: You have a natural talent with your chosen school. When casting conjuration spells, you achieve a better effect than others.
Prerequisites: Spell Focus (conjuration)
Your summoned creatures gain a +1 morale bonus on all unarmed, melee and ranged weapon damage rolls, provided you summon them with your own spells or with spell completion items. Your called creatures also gain the same bonus, but you can cancel it as a free action at any time. Your healing spells that come from the school of conjuration also receive +1 point per die, if this bonus is applicable. Your creation spells all last one time increment longer than their normal duration (one extra round if the duration is in rounds, one minute if in minutes, etc.).