Hatred (4e Feat)
From D&D Wiki
You absolutely hate a particular kind of creature.
Benefit: Choose an Origin and a Type (for example, Fey Beast or Natural Animate). On your first attack roll against a creature of that origin and type in an encounter, you may re-roll your attack roll and re-roll and damage die rolls of 1 or 2 (as though the attack had the Brutal 2 property).