Improving Melee Attacks with Divinity

[EmperorSarda]

So question, there are feats, such as Sacred Vengeance, that let you spend a turn attempt to add damage to your attack against undead. Are there any feats that allow the same with divine spells, sacrificing a spell to gain melee damage, or even sneak attack damage?

[Matticussama]

You could see if your DM would allow you to take the Arcane Strike feat (Complete Arcane) as a Divine feat. There is nothing about the feat itself which is particularly arcane-magic focused, and it would easily function as a Divine feat.