Treasonous Ogre is a uncommon Creature — Ogre Shaman card from Conspiracy (CNS), collector number 36. Current market price: $20.90 (foil $99.77), TCGplayer market prices via Scryfall.
Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.) Pay 3 life: Add {R}.