Although the concept of metamagic has existed since the beginning of magical study, it has generally been ignored by most wizards, who have been far more interested in spectacular effects and immediate results.
2012, Nitehawk Interactive Games, Outcastia Campaign Setting Book I: World Tour[1], →ISBN, page 183:
Spells modified by a metamagic feat use a spell slot higher than normal. This does not change the level of the spell, so the DC for saving throws against it does not go up.
2012, Vincent Venturella, The Legacy of Heroes: A Fantasy Role-Playing Game Player's Guide[2], →ISBN, page 206:
This unusual metamagic causes a spell to seemingly do nothing when cast. You must still use your standard action to cast the spell in the same round that the metamagic has been used.