At 5th level, a cruoromancer can control up to 5 Hit Dice worth of undead creatures per caster level instead of the normal 4 Hit Dice of undead when casting the animate dead spell. He also gains the following blood infusion ability.
Commanding Infusion: When using this infusion with animate dead, the cruoromancer can create a number of Hit Dice of undead equal to three times his caster level instead of twice his caster level.
This ability replaces the 5th-level wizard bonus feat.