Kellogg, Dangerous Mind is a rare Legendary Creature — Human Mercenary card from Fallout (PIP), collector number 415. Current market price: $7.60 (foil $7.11), TCGplayer market prices via Scryfall.
First strike, haste Whenever Kellogg attacks, create a Treasure token. Sacrifice five Treasures: Gain control of target creature for as long as you control Kellogg. Activate only as a sorcery.