Bête Noire, Soul of Hate

Reach, Lifelink, Hexproof
Whenever Bête Noire defeats one of your opponents cards choose 1:
• The card that died goes to your side of the field under your control.
• Gain 1 soul (Each soul gives a permanent +{1}/{1} for each soul)
Whenever it's the start of your turn you may consume 3 souls, if you do gain 5 life and Double Strike for the rest of the turn.