Diabolos' Three-Headed Razor Whip (Uber Rare) [Descent into the Raven's Catacombs]

You pay X less to play this card, where X is the number of resonators in the field. Added resonator gains [+300/-300], [Terrifying], "If this card attacks, choose the attacked object at random." and "Pay 600 life: This card gains [Eternal] until end of turn.". [Enter] Add this card to target resonator you control. Whenever added resonator deals battle damage to a player >>> That player's life becomes their current life divided by two, rounded down. [Bestow] [Rest], B, destroy a resonator you control chosen at random.