Replaces 15/20/25/30% Spell Amplification with 10/15/20/25% base damage amplification. The ability now also silences the target and can be cast on enemies. Decreases Cast Range from 800 to 400. Increases Mana Cost from 0 to 60. ?Level 20 Talent that reduces Bloodrage's Max Health damage doesn't affect enemy casts. Aghanim's Scepter upgrade also affects only Bloodseeker and doesn't provide bonus damage to enemies